Analysing the different organs and systems of the human body, choose the correct alternative. a) The human digestive system is formed by a long t...

Analysing the different organs and systems of the human body, choose the correct alternative.


a) The human digestive system is formed by a long tube of about 9m in length and accessory glands (salivary glands, liver, bile duct, and appendix).
b) The respiratory system has the basic function of promoting gas exchange between cells and the external environment. In the respiratory surfaces of the lungs, there is diffusion of O2 to the external environment and entry of CO2.
c) The heart is the central organ of the circulatory system, with oxygenated blood circulating in the right atrium and deoxygenated blood in the left atrium.
d) Among the main functions of the excretory or urinary system, the regulation of water volume in the body and the release of hormones from the gland are highlighted.
e) The brain is subdivided into telencephalon (cerebrum), diencephalon, metencephalon (cerebellum), pons, and myelencephalon (medulla).