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Results for: 'One proposed family tree for modern humans Animation'
How proteins function? How do proteins work?
By: HWC, Views: 6287
How proteins function is really about how proteins "do work" in cells. How do proteins work? Let's start thinking about protein function by looking at something important to you: your hair. Keratin is a structural protein that is composed of 2 intertwined or helical strands. Keratin is also f...
Stress and Immune System Animation
By: Administrator, Views: 9892
How stress and the immune system are linked. Immune response declines with age, limiting body's ability to identify and fight foreign substances. Loss of thymus cortex leads to reduced production of T lymphocytes, including T cells, NK cells, B lymphocytes. Frequency and severity of infectio...
By: Administrator, Views: 9918
Digestive system contains both primary and accessory organs for the conversion of food and fluids into a semiliquid that can be absorbed for the body to use. Three main functions: - Digestion - Absorption - Elimination With aging: - Digestive system becomes less motile. - Glandular sec...
By: Administrator, Views: 335
Muscles of both the upper arm and forearm control movement of the forearm. The biceps brachii flex the forearm and work with the supinator of the forearm to rotate it so the palm faces upward. The pronator teres and quadratus control pronation, or rotation of the forearm so that the palm faces do...
Wrist Flexion and Extension Animation
By: Administrator, Views: 530
Flexion describes the movement of bending the palm down, towards the wrist. Extension describes the movement of raising the back of the hand.
Cellular slime mold life cycle Animation
By: HWC, Views: 882
Life cycle of Dictyostelium discoideum, a cellular slime mold Animation. Amoeba-like slime mold cells live in the soil, where they feed on bacteria. The free-living cells grow and reproduce by mitosis. When food dwindles, the amoebas stream toward one another in response to a chemical...
Head and Neck Movement Animation
By: Administrator, Views: 299
Interestingly, head and neck muscles are the first ones that the baby can control. A baby can hold his head up before he can sit erect. The muscles of the head and neck perform many important tasks, including movement of the head and neck, chewing and swallowing, speech, facial expressions, an...
By: Administrator, Views: 9245
Types of body movement that occur at the diarthrotic joints: - Abduction - Adduction - Circumduction - Dorsiflexion Movement can occur in one plane, like with a knee bend, or in multiple planes such as with a shoulder roll. Adduction occurs when a joint moves a part of the body toward the ...
By: Administrator, Views: 420
The elbow pronation test is performed by placing a hand on the elbow, flexing the carpus to 90 degrees, and rotating the toes out (thus inwardly rotating the antebrachium), which places stress on the medial compartment of the elbow. Pronation – Lying prone (face downward); also turning the p...
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