The ulna, radius, and humerus are the three bones of the arm. the elbow is formed where these bones meet. which is another name for the elbow? a) joint b) tendon c) cartilage d) bone marrow

The correct answer is -

A) joint.

Explanation:

Elbow is considered as a hinge joint, which is formed between the forearms and upperams. It is formed particularly between proximal ends of the radius and ulna bones located in the forearm and the humerus bone distal end, located in the upper arm.

It allows the movement of the forearm with respect to the upper arm, as well as the rotation of the wrist.

Thus, option A) is the right answer.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

not sure if this is what you'r looking for eubacteria and archaebacteria