Answer:
They are veins and arteries. The primary function of arteries is to transport highly oxygenated, nutrient-rich blood from our hearts and distribute it to the rest of our body. Veins, on the other hand, are used to pump much-needed blood back to the heart.
Answer:
i want to say B because they experiment and get multiple types of results
Question: If they aren't hermaphrodites, can they still be male and female at the same time?
Facts: Different snails reproduce differently, but most snails are "hermaphrodites." Being a hermaphrodite means that any given snail can be both male and female at the same time. This can make it a lot easier for snails to reproduce and quickly make a whole lot of snails! Some hermaphrodite snails do not need another snail to reproduce, but can make more snails all by themselves (this is called asexual reproduction). Other snails are hermaphrodites but still need another snail to reproduce (this is called sexual reproduction). There are also some snails that aren't hermaphrodites, but are either male or female, and must find a snail of the opposite sex to breed with.
A cell respires a concentration of glucose and oxygen inside the cell and these substances move inside the cell. Finally, as carbon dioxide is produced and the concentration of the cell increases amidst the surrounding blood, carbon dioxide diffuses out of the cell.
