<span>Lipids are an energy rich fuel source. They include fatty acids (fats), oils, waxes and steroids, such as cholesterol and can be found both in plants and animals. Lipids provide the body with nine calories per gram, making them the most energy rich component of food. So, the answer is that : Lipids are high in Calories and could be used for energy storage in animals.</span>
Hemopoietic is your anwser
Answer:
B. Smooth muscle in the tunica media
Explanation:
Arteries contains elastic and smooth muscle fibers that helps in contraction and expansion, respectively. The smooth muscle fibers are present in the tunica intima which is the thickest and middle layer of arteries.
Connective tissues and endothelium don't play a direct role in contraction or expansion. However, elastin proteins helps in contraction.
Hope this help.
I would say that they can't swallow. that's why they have the umbilical cord.
