Diffusion of O2 and CO2 occurs at the alveoli in the lungs.
by diffusion across a capillary wall
yes
the respiratory system
Respiratory system
Nutrients are transported into the blood from the digestive system and then delivered to tissue spaces by the circulatory system. Waste and respiratory gases are removed from tissue spaces into the blood, and then expelled from the body through the respiratory and excretory systems. Transport mechanisms include diffusion, active transport, and circulation.
by diffusion across a capillary wall
in the lungs
diffusion
hai :) it is in your book dont be lazyass.
Gas exchange occurs in the alveoli in the respiratory system. The thin-walled structures allow diffusion of gases into and out of the capillaries.
Diffusion occurs in the respiratory system, where oxygen and carbon dioxide exchange happens in the lungs. It also occurs in the digestive system, where nutrients pass through the walls of the small intestine into the bloodstream. Additionally, diffusion takes place in the circulatory system, where gases and nutrients move between blood and tissues at the capillaries.
hydra has no specialized respiratory organs and exchanges of gases take place via simple diffusion from surface lining of the enteron on so in this way the surface lining of enteron acts as an efficient respiratory surface
By diffusion across a capillary wall.
By diffusion across q capillary wall
The respiratory system is the anatomical system of an organism that introduces respiratory gases to the interior and performs gas exchange. In humans and other mammals, the anatomical features of the respiratory system include airways, lungs, and the respiratory muscles. Molecules of oxygen and carbon dioxide are passively exchanged, by diffusion, between the gaseous external environment and the blood.
Flat worms do not have blood. There fore, they do not require a respiratory system to infuse fresh oxygen into the blood. This lack of a respiratory system, means they do not have lungs.
No, Platyhelminthes lacks a circulatory system and a respiratory system.