Venus return is the rate of the blood flow that leads back to the heart. It usually normally limits cardiac output.
The pump is when your muscles will swell up during your workout, which is caused from the excessive amount of blood going into the muscle and filling it up the same way you would kinda fill up a water balloon.
A Respiratory Pump is one of those abdominal and thoracic structures that cause the expansion and contraction of the lungs.
Gravity is the phenomenon by which two bodies having mass are litarally just attracted to each other.
Hope this helps:)
Structure and function of the villi is described below.
Explanation:
- Intestinal villi are small, finger-like projections that extend into the lumen of the small intestine.
- Each villus is approximately 0.5–1.6 mm in length (in humans), and has many microvilli projecting from the enterocytes of its epithelium which collectively form the striated or brush border. Each of these microvilli are much smaller than a single villus. The intestinal villi are much smaller than any of the circular folds in the intestine.
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Villi increase the internal surface area of the intestinal walls making available a greater surface area for absorption.
- increased surface area (in contact with the fluid in the lumen) decreases the average distance travelled by nutrient molecules, so effectiveness of diffusion increases. The villi are connected to the blood vessels so the circulating blood then carries these nutrients away.
Function :
- There, the villi and the microvilli increase intestinal absorptive surface area approximately 30-fold and 600-fold, respectively, providing exceptionally efficient absorption of nutrients in the lumen.
- There are also enzymes (enterocyte digestive enzyme) on the surface for digestion. Villus capillaries collect amino acids and simple sugars taken up by the villi into the blood stream. Villus lacteals (lymph capillary) collect absorbed chylomicrons, which are lipoproteins composed of triglycerides, cholesterol and amphipathic proteins, and are taken to the rest of the body through the lymph fluid.
- Villi are specialized for absorption in the small intestine as they have a thin wall, one cell thick, which enables a shorter diffusion path. They have a large surface area so there will be more efficient absorption of fatty acids and glycerol into the blood stream. They have a rich blood supply to keep a concentration gradient.
A conscience would be correct
D.<span>sebaceous glands secrete oily substances onto the skin to maintain waterproof, impermeable barrier traits. skin can still function without these glands,The epidermis is not truly accessory as it is an essential part of the integument system. Without the epidermis the integumentary system cannot function ,accessory organs also occur in other systems eg the prostate in the reproductive system. Assessory organs aid in the performance of the system, but are not essential to the system function. thus epidermis is not accessory</span>
Answer:
lets see depression starts around the age of 8 soooo i would sayyy for a kid tht doesnt have many things to worry abt i would say anxiety
Explanation:
