Question

2. Osteocytes are living cells surrounded by hard, mineralized extracellular matrix. With reference to the roles played by each of these labelled components of the osteon, explain: how is it possible for the osteocytes to remain alive despite being almost completely surrounded by impermeable extracellular matrix? You might start by asking yourself: in general, what do cells need in order to stay alive? Think back to your pre-lab work: here is another chance for you to write an explanation, this time to answer a question about bone tissue, by taking into account the key parts, what those parts do, and how they interact as a system that can support living cells surrounded by matrix. WRITE YOUR RESPONSE HERE PLEASE

Answer 1

2. For staying alive , the cells need proper nutrition and energy. In osteocytes, despite having impermeable membranes , it remains alive with the help of canaliculi. Canalaculi are small channels present in between the cytoplasmic processes of adjacent osteocytes.

1. Functions of Erythrocyte:

A. Carry hemoglobin.

B. Transports oxygen to from lungs to the body.
(respiratory gas transport)

Structure of Erythrocyte :

1. It lacks nucleus and chromatin

2. doesn't have mitochondria so ATP production takes place by glycolysis.

Function of Leukocytes :

A. They protect body against infectious disease and foreign organisms.
B. They kill and digest bacteria as well as fungi.

Structure of Leukocyte :

1. it lacks hemoglobin but have nucleus.
2. Leukocytes are motile , so killing of foreign organisms becomes easier.