Which type of blood vessel carries blood away from the heart?

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from

Can someone me i need the answer and don’t understand?

The model illustrates a process by which a substance is taken up by a cell. which statements describe the process? a. the model shows the process of endocytosis. b. the process shown in the model requires energy from the cell. c. the cell membrane in the model remains intact throughout the process. d. the model shows the process of facilitated diffusion.