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Oxygenated blood gets to the hearts muscles through three coronary arteries that are outside the heart. They branch from the aorta just above the left ventricle and conduct blood through smaller arteries and capillaries into the walls of the heart. Veins passing through the heart join to form the coronary sinus, a cavity from which venous blood flows into the right atrium.
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What occurs in the capillaries?
Capillary exchange- exchange of gases- internal or tissue respiration
What are the different kind of blood vessels and stake their function?
Artery - Carries oxygenated blood (apart from pulmonary artery which goes to the lungs to collect oxygen) away from the heart to other parts of the body. They have thick muscle walls and small spaces for blood to pass through. Vein - Carries de-oxygenated blood (apart from the pulmonary vein which goes from the lungs back to the heart) towards the heart, from other parts of the body. They have thin muscle walls and a large space for the blood to travel through. Capillaries - Allow oxygenated blood to enter muscles and other body parts, and allow de-oxygenated blood back in, in order to carry it back to the heart. Very small with thin walls to allow movement of blood cells through the walls. Hope this helps
What are three examples of a invoulentary muscle?
cardiac muscle walls of the stomach and intestines walls of blood vessels
What type of muscle is found in the walls of hollow organs and in the walls of blood vessels?
multiunit smooth muscle are found in those areas and a few more.
How are the jobs of a vein and artery the same?
Whilst the vein carries deoxygenated blood towards the heart and the artery carries oxygenated blood away from the heart and to the muscle, both of the blood vessels are the same in that they both carry blood. The arteries have 'springier', thicker walls as they have to carry the blood at a higher pressure. The flex in the walls helps them to not burst under the pressure.
What kind of Involuntary muscle is found in the walls of blood vessels and in the digestive tract?
Smooth muscle tissue is the type of muscle tissue found in the walls of many organs and blood vessels in the body.
What is the pressure that blood exerts against the walls of the arteries when the hearts is in contracted state?
high blood
Oxygenated blood thin walls goes toward the heart?
It goes through the cranial vena cava
What are the characteristic of arteries?
They have thick walls and carry oxygenated blood from the heart around the body
What are the four chambers of the heart made of?
The heart is comprised of the left and right atria and the left and right ventricles. The atria pump blood to the lungs, where it is oxygenated. The oxygenated blood then returns to the heart, where the ventricles pump it to the rest of the body. They are made of cardiac muscle, which is branched, striated and contains intercalated discs, which coordinate rhythmic movement. The walls of the atria are thinner, due to the relatively short distance blood must travel to the lungs, while the ventricle walls are thicker and able to provide a stronger push for blood to travel through the body.
What is a sentence for smooth muscle?
Smooth muscle in blood vassals walls and activates pain receptors.
Smooth muscle can be found in the walls of blood vessels and in the?
digestive tract
