An organ is made of tissues. A tissue is made from multiple cells that carry out the same function, For example : a cardiac muscle is made from many cells of the same type. An organ whereas is made from group of tissues which have similar structure and functions.
I hope this helps.
Answer:
because they r
Explanation:
In the particular case of motion, a reference point is a stationary point in space. ... A reference point is important in determining motion because in order to say that something is moving, you need to have something stationary to compare it to.
Answer:
Primary lymphoid organs: These organs include the bone marrow and the thymus. They create special immune system cells called lymphocytes.
Secondary lymphoid organs: These organs include the lymph nodes, the spleen, the tonsils, and certain tissue in various mucous membrane layers in the body (for instance in the bowel). It is in these organs where the cells of the immune system do their actual job of fighting off germs and foreign substances.
Also...
Bone marrow is a sponge-like tissue found inside the bones. That is where most immune system cells are produced and then also multiply. These cells move to other organs and tissues through the blood. At birth, many bones contain red bone marrow, which actively creates immune system cells. Over the course of our life, more and more red bone marrow turns into fatty tissue. In adulthood, only a few of our bones still contain red bone marrow, including the ribs, breastbone, and pelvis.
One type of anaerobic respiration would be air.