for poo.
The capillarys are in the lungs and blood flows trough them.As far as I know, blood does not flow back through the capillarys so it most likely does not flow back through the capillary beds.
The thallus structure of lichens helps in respiration by providing a large surface area for gas exchange to occur. This structure allows lichens to efficiently absorb and release oxygen and carbon dioxide required for respiration.
No, It is not used for respiration instead it is used for the movement or locomotion of body.
If you are looking for a single organelle, then I would say the mitochondria. They are the site of respiration and are adapted for efficient gas exchange.
Their cell wall.
Specialized cell structures are designed to perform specific functions within a cell. The structure of these organelles is adapted to support their specialized function. For example, the shape and composition of mitochondria are optimized for energy production through cellular respiration.
respiration
Mitochondria.
Two ways in which the structure of a capillary is adapted to its function is to encourage the exchange of oxygen. Another reason is to encourage the exchange of carbon dioxide.
chloroplast and mitochondria
well, the capillaries connect the arteries and the veins, so, it carries blood to and from the heart.