The function of the arteries is to carry oxygenated blood to organs and cells in the body. Because of this, arterial blood has a bright red color and flows away from the heart.Know More
Arterial walls have three layers. The outer layer is elastic connective tissue, and the middle layer is made out of muscle. The inner lining of the artery is made up of smooth cells called the endothelium, which are similar to the cells in the heart. When the heart beats, the walls of the arteries enlarge to make room for the blood that's pumped into them. Then, the muscular layer contracts slowly to pump the blood further down the arteries to the arterioles and capillaries.
The largest artery in the body is the aorta, which connects directly to the heart. Two branches of the aorta are the coronary arteries, which both send oxygen and nourishment to the heart. The carotid arteries send blood to the sides of the head and neck. The aorta divides in the abdomen to form the iliac arteries, which then continue down into the legs. When the blood is depleted of oxygen, it's collected by veins and sent to the pulmonary arteries and lungs.Learn more about Biology
The ventral blood vessel carries blood to the back portion of the worm's body. The ventral blood vessel is only one part of the worm's closed circulatory system. The other parts of the worm's circulatory system include the aortic arches and the dorsal blood vessels.Full Answer >
The sense organs take in sensory information that gets sent to the brain, and the body acts on these messages. The sense organs are those responsible for the ability to experience the five senses, which are touch, smell, taste, hearing and sight.Full Answer >
A group of organs working together so that they can perform a function more complex than any of the single organs is called an organ system. Each of the 11 organ systems found in the human body contributes in some manner to the survival of all its living cells. Some of the ways in which organ systems maintain the body's internal stability are by acquiring and distributing raw materials and nutrition, collecting and disposing of wastes and protecting the body from attack and injury.Full Answer >
Adrenaline, a natural stimulant created in the kidney's adrenal gland, travels through the bloodstream and controls functions of the autonomous nervous system, including the secretion of saliva and sweat, heart rate and pupil dilation. The substance also plays a key role in the human flight-or-flight response.Full Answer >