Question

1. major veins and artery to the skin are located in the

dermis, epidermis, subscutaneous, or stratum corneum

2. Hamatopoiesis can occur at different ages in:

the liver, the spleen, red bone marrow, or all of these

3. the extracellular matrix of the bone tissue contains:

blod, calcium phosphate, fibers, or cartilage

Answer 1

Answer 1:

The right choice is: DERMIS

DERMIS contains blood vessels and nerves. These blood vessels provides the nutrients to the upper layer of skin i.e epidermis. Subcutaneous part of skin contains larger blood vessels.

Answer 2:

The right choice is: All of these

Explanation: Hematopoiesis is the process of production of cellular components of blood and blood plasma which takes place in bone marrow, liver and spleen. It starts in yolksac in prenatal then continues in liver and spleen in children and in adults it happens in bone marrow.

Answer 3:

The right choice is: Fibers

Explanation:  Fiber found in the extracellular matrix of the bone is collagen. It constitutes 90% of the bone. Another component of extracellular matrix is calcium salts.