A Simple Key For human anatomy & physiology Unveiled

A Simple Key For human anatomy & physiology Unveiled

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articular capsule – connective tissue framework that encloses the joint cavity of a synovial joint.

appendicular skeleton – all bones of your higher and decreased limbs, plus the girdle bones that connect Every single limb into the axial skeleton.

chitin – type of carbohydrate that forms the outer skeleton of all arthropods which include crustaceans and insects; it also varieties fungi cell walls.

acrosome – cap-like vesicle Positioned for the anterior-most region of a sperm that's prosperous with lysosomal enzymes effective at digesting the protective levels bordering the oocyte.

Security from the heart, lungs, and other organs and structures while in the upper body creates a dilemma somewhat diverse from that of your central anxious system. These organs, the perform of which includes movement, growth, and contraction, need to have a flexible and elastic protecting covering. This type of masking is provided by the bony thoracic basket, or rib cage, which types the skeleton with the wall on the chest, or thorax.

anterior column – white matter involving the anterior horns on the spinal cord composed of many various teams of axons of both equally ascending and descending tracts.

arrector pili – sleek muscle mass that is certainly activated in response to exterior stimuli that pull on hair follicles and make the hair “arise”.

cortex – more info in hair, the second or middle layer of keratinocytes originating from your hair matrix, as noticed inside a cross-segment of the hair bulb.

wide ligament – extensive ligament that supports the uterus by attaching laterally to both sides from the uterus and pelvic wall.

acrosomal reaction – launch of digestive enzymes by sperm that permits them to burrow with the corona radiata and penetrate the zona pellucida of the oocyte just before fertilisation.

amniotic cavity – cavity that opens in between the internal cell mass and also the trophoblast; develops into amnion.

arachnoid trabeculae – filaments between the arachnoid and pia mater in the subarachnoid Area.

cricoid cartilage – percentage of the larynx made up of a hoop of cartilage human anatomy definition with a large posterior area and a thinner anterior region; hooked up for the oesophagus.

brachial plexus – nerve plexus connected to the lower cervical spinal nerves and initially thoracic spinal nerve.