Contain haemoglobin (rich in iron) to carry oxygen. Biconcave shape to provide a large surface area for the diffusion of oxygen. No nucleus to provide more space for haemoglobin. White blood cell ...

Remove the skin from the ventral surface then slowly pull away the muscle tissue ... listed in Table 1 and shown in Figure 5.3. Functional anatomy of circulatory and respiratory system is important.

For an organism to function, substances must move into and out of cells. Three processes contribute to this movement – diffusion, osmosis and active transport. Cellular respiration and transport ...