blood rich in oxygen enters the lungs through the pulmonary artery in where the alveoli within the lungs exchange carbon dioxide and oxygen so the carbon dioxide leaves your body.
Hope this helps a bit
Answer:
Reciprocal altruism is one of the altruism behaviors in which an individual organism helps in increasing the fitness of another organism by reducing the fitness of itself temporarily in expectation of the same behavior from another organism in the future later.
It takes place in the same set of organism partners which is a continuous interaction ion in stable groups of organisms.
Thus, the correct answer would be - an ongoing interaction in the same set of partners.
A or B. Because the respirtory system’s main job is to move air into your body while removing waste gases
All cetaceans exhibit similar surface behaviour like breaching,spy hopping,spouting etc..they are huge mammals who live in marine water.they live as a family
