The vein of Galen (VG), also known as the great cerebral vein, is one of the large blood vessels in the skull draining the cerebrum (brain). It is prone to congenital defects, such as vein of Galen aneurysmal malformations (VGAM) and vein of Galen aneurysmal dilation (VGAD). It is named after its discoverer, the Greek physician Galen. Vein of Galen - External link. Illustration of vein from Gray's Anatomy HEAD: ARTERIES: carotid - common carotid - internal ca ...

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In human anatomy, the cephalic vein is a superficial vein of the upper limb. It communicates with the basilic vein via the median cubital vein at the elbow and is located in the superficial fascia along the anterolateral surface of the biceps brachii muscle. Superiorly the cephalic vein passes between the deltoid and pectoralis major muscles and through the deltopectoral triangle, where it empties into the ...

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The term chest hair is generally used to describe hair that grows on the anterior torso of human males. The hair is typically short (about 1 inch long) and may extend across both chest and abdomen in a variety of growth patterns. The slang terms "happy trail" and "treasure trail" refer to hair growth between the navel and pubic region. Among males, chest hair is a common secondary sex characteristic, and the development ...

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The clitoris (plural: clitorides) is a sexual organ in the body of female mammals. The visible knob-like portion is located near the anterior junction of the labia minora, above the opening of the vagina. Unlike its male counterpart, the penis, the clitoris has no urethra, is not involved in urination, and its sole function is to induce sexual pleasure. The word: clitoris can be pronounced KLIHT uh rihs (['klɪtəɹəs] in IPA notation (li ...

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• Clitoris - Development and formation
• Clitoris - Recognition of existence
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The vertebral arteries are branches of the subclavian arteries. They arise, one on each side of the body, then enter deep to the transverse process of the level of the 6th cervical vertebrae (C6). It then proceeds superiorly, under the transverse process of each cervical vertebra until C1 where it enters the skull via the foramen magnum. Inside the skull, the two vertebral arteries join up to form the basilar artery at the base of the medulla oblongata. The basilar artery is the main blood supply to the brainstem and connects to the Circle of Willis to potentially supply the rest of t ...

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The anterior pituitary (also called the adenohypophysis) comprises the anterior lobe of the pituitary gland and is part of the endocrine system. Under the influence of the hypothalamus, the anterior pituitary produces and secretes several peptide hormones that regulate many physiological processes including stress, growth, and reproduction. Anterior pituitary - Anatomy and development. The adenohypophysis is a pea-size gland anterior to the neurohypophysis, caudal to the hypothalamus, and sits in the ...

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• Anterior pituitary - Anatomy and development
• Anterior pituitary - Histology
• Anterior pituitary - Physiology
• Anterior pituitary - Major hormones secreted
• Anterior pituitary - Role in disease

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The superior and inferior venae cavae are the veins that return the blood from the body into the heart. They both empty into the right atrium. The inferior vena cava travels up alongside the abdominal aorta with blood from the lower part of the body. The superior vena cava is above the heart, and forms from a convergence of the left and right brachiocephalic veins that contain blood from the head and the arms. The vena cava carries blood from the body to the ri ...

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Corneal endothelium is the inner most layer of the cornea, the corneal endothelium is a monolayer of squamous epithelial cells lining the anterior chamber of the eye. Loss of the corneal endothelium is the leading cause of corneal transplant failures. The corneal endothelium engages in fluid transport, and is responsible for the hydration of the cornea. Other related archivesanterior, cells, cornea, endothelium, epithelial, eye, squamous, transplant

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In human anatomy, the basilic vein is a superficial vein of the upper limb. It communicates with the cephalic vein via the median cubital vein at the elbow and drains into the axillary vein. It is a superficial vein that drains the back of the hand and forearm. It communicates with the cephalic vein via the median cubital vein at the elbow, then runs superficially medial to the biceps brachii muscle and perforates the deep fascia about midway up the arm where it runs medial to the brachial artery. It joins the brachial vein and becomes the axillary ...

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This article is in need of attention. You can help Wikipedia by editing it into a better article. Please also consider changing this notice to be more specific. See under classes: Actinopterygii and Sarcopterygii Class Osteichthyes are the bony fish, a group paraphyletic to the land vertebrates, which are sometimes included. Most belong to the Actinopterygii. The other seven living species are called lobe-finned fish, and include lungfish and coelacanths. Som ...

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In human anatomy, the basilar artery is one of the arteries that supplies the brain with oxygen-rich blood. It arises from the confluence of the two vertebral arteries at the level of the medulla oblongata. It ascends in the central gutter (sulcus basilaris) inferior to the pons and divides into the two posterior cerebral arteries. From the basilar artery arise branches for the supply of the cerebellum (largely via the anterior inferior cerebellar artery), as ...

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Alderfly is the name given to neuropterous insects of the family Sialidae, related to the ant-lions, with long filamentous antennae and four large wings, of which the anterior pair is rather longer than the posterior. The females lay a vast number of eggs upon grass stems near water. The larvae are aquatic, active, armed with strong sharp mandibles, and breathe by means of seven pairs of abdominal branchial filaments. When full sized they leave the water and spend a quiescent pupal stage on the land before ...

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The vagina, (from the Latin for "sheath" or "scabbard" ) is the tubular tract leading from the uterus to the exterior of the body in female placental mammals and marsupials, or to the cloaca in female birds, monotremes, and some reptiles. Female insects and other invertebrates also have a vagina, which is the terminal part of the oviduct. Vagina - Human vagina. Vagina - Anatomy. The human vagina is an elastic muscular tube about 4 inches (100 mm) long and 1 inch (25 mm) in diame ...

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• Vagina - Anatomy
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• Vagina - Sexual health and hygiene
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In anatomy, the head of an animal is the anterior part (from anatomical position) that comprises the mouth, the brain and various sensory organs (e.g. organs of sight, hearing, smell and taste). Head - Anatomy. The front (ventrum) of the head, where the eyes and ears and mouth are located, is called the face. The area above the eyes is called the forehead (the front of the head). Below the mouth is the chin. Younger aged humans and some older humans heads have a continuing growing layer ...

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• Head - Anatomy
• Head - Human head anatomy
• Head - The face
• Head - Cultural import
• Head - Clothing
• Head - Pseudoscientific study of the human head

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Affective neuroscience is the study of the neural mechanisms of emotion. This interdisciplinary field combines neuroscience with the psychological study of personality, emotion, and mood. Affective neuroscience - Brain areas related to emotion. Emotions are thought to be related to activity in brain areas that direct our attention, motivate our behavior, and determine the significance of what is going on around us. Pioneering work by Broca (1878), Papez (1937), and MacLean (1952) suggested that emotion is r ...

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The brachial artery is the major blood vessel of the upper arm. It is a continuation of the axillary artery and it originates from the lower margin of teres major muscle and continues down the arm, until it reaches the cubital fossa at the elbow. It then ends by dividing into the radial and ulnar arteries which run down the forearm. The brachial artery has smaller branches along it. These supply the muscles of the upper arm, suc ...

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The calf or sura is a pair of muscles -- the gastrocnemius and soleus -- at the back of the lower human leg. The calf muscle is connected to the foot through the Achilles tendon, which acts to plantar flex the foot. so it is used extensively in walking and running. ILIAC REGION: gluteus (maximus, medius, minimus) | iliacus | gemellus (inferior, superior) | obturator (externus, internus) | quadratus femoris | piriformis | tensor fasciae latae THIGH: adductor (brevis, longus ...

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Arachnida - spiders, scorpions, etc. Merostomata - Horseshoe crabs, etc. Pycnogonida - sea spiders The Subphylum Chelicerata constitutes one of the major subdivisions of the Phylum Arthropoda, including the arachnids, horseshoe crabs, and related forms. These mainly predatory arthropods outlasted the now extinct trilobites, the common marine arthropod of the Cambrian era. Most of the marine chelicerates, ...

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See text. The bullhead sharks are a small order (Heterodontiformes) of very basal (primitive) modern sharks (Neoselachii). There are eight living species in a single genus, Heterodontus, in the family Heterodontidae. All are relatively small (50 to 150 cm) bottom feeders in tropical and subtropical waters. The symbol '$' below indicates a synapomorphy, (a character believed to be uniquely present ...

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Bronchial Artery The bronchial arteries supply nutrients and oxygen to the root of the lungs, the supporting tissues of the lungs, and the visceral pleura of the lungs. The right and left bronchial arteries supply the right and left lungs respectively. It is a common mistake to believe that the lungs take their only blood supply from the right side of the heart, which is the side of the heart that pumps blood to the lungs to be oxygenated. The bronchial arteries instead take their blood supply from the left side of the heart, w ...

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In animals, the brain, or encephalon (Greek for "in the head"), acts as the control center of the central nervous system. In most animals, the brain is located in the head close to the primary sensory apparatus and the mouth. While all vertebrate nervous systems have a brain, invertebrate nervous systems may have either a centralized brain or collections of individual ganglia. The brain is an extremely complex organ; for example, the human brain is a collection of 100 billion neurons, each linked with up to 25,000 others [1]. T ...

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• Brain - Mind and brain
• Brain - History
• Brain - Modern neuroscience
• Brain - Comparative anatomy
• Brain - Invertebrates
• Brain - Vertebrates
• Brain - Neurobiology
• Brain - Histology
• Brain - Function
• Brain - Brain pathology
• Brain - The study of the brain
• Brain - Fields of study
• Brain - Methods of observation
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• Brain - Brain as food

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Birds are bipedal, warm-blooded, egg-laying vertebrates characterized primarily by feathers, forelimbs modified as wings, and hollow bones. Birds range in size from the tiny hummingbirds to the huge Ostrich and Emu. Depending on taxonomic viewpoint, there are about 8,800–10,200 living bird species (plus about 120–130 that have become extinct in the span of human history) in the world, making them the mos ...

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• Bird - Mating systems and parental care
• Bird - Respiration
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