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Flexion and extension are movements that affect the angle between two parts of the body. These terms come from the Latin words with the same meaning. [a] Flexion is a bending movement that decreases the angle between a segment and its proximal segment. [9] For example, bending the elbow, or clenching a hand into a fist, are examples of flexion ...
The human back, also called the dorsum (pl.: dorsa), is the large posterior area of the human body, rising from the top of the buttocks to the back of the neck. [1] It is the surface of the body opposite from the chest and the abdomen.
In anatomy, flexor is a muscle that contracts to perform flexion (from the Latin verb flectere, to bend), [1] a movement that decreases the angle between the bones converging at a joint. For example, one's elbow joint flexes when one brings their hand closer to the shoulder , thus decreasing the angle between the upper arm and the forearm .
superficial palmar arch, common palmar digital arteries, deep palmar arch, dorsal digital artery: deep branch of ulnar nerve, median nerve: flex metacarpophalangeal joints, extend interphalangeal joints: 8 1 dorsal interossei (hand) 1-4 Upper limb, Hand, Intermediate metacarpals: proximal phalanges: dorsal metacarpal artery, palmar metacarpal ...
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
These two terms, used in anatomy and embryology, and zoology, describe something at the back (dorsal) or front/belly (ventral) of an organism. [ 2 ] The dorsal (from Latin dorsum 'back') surface, (also dorsum ) of an organism or organ , refers to the back, or upper side, such as in the human, the dorsum of the tongue , the dorsum of the hand ...
In anatomy, extension is a movement of a joint that increases the angle between two bones or body surfaces at a joint. Extension usually results in straightening of the bones or body surfaces involved.
The dorsal portion of the spinal column houses the spinal canal, an elongated cavity formed by the alignment of the vertebral neural arches that encloses and protects the spinal cord, with spinal nerves exiting via the intervertebral foramina to innervate each body segment. There are around 50,000 species of animals that have a vertebral column ...