Why is the heart a muscle and not an organ? Is it both an
2016年3月17日 · The heart is an organ which is made from muscle. Organs are a collection of tissues that are specialised for their purpose. Muscle is a type of tissue. The heart is made up of a collection of different tissues such as nervous tissue, connective tissue and cardiac muscle (muscle specialised for the heart) and blood (which is classified as a tissue as it is a collection …
Which is more important, the heart or the lungs? What are
2017年2月4日 · Explanation: In order to simply explain why we can't choose which is more important, we must first understand what these 2 organs primarily do. The Heart- It is the only blood pump inside the body. Without it, the blood will stay stagnant inside the blood vessels. Therefore, the blood will not get oxygenated because it cannot go to the lungs ...
What is the structure and function of the heart of a fish?
2016年11月3日 · The Heart is a pumping device that pumps blood. The heart of a fish is a two-chambered heart. It has one Auricle and one ventricle. Blood from all the parts of the body is sent to auricle, auricle pumps that blood to ventricle and ventricle pumps that blood to gills for the purpose of oxygenation. From the gills, oxygenated blood is supplied to all the parts of the …
What are the organs of the circulatory system? - Socratic
2018年6月11日 · The main organ is the heart. The heart constantly pumps blood throughout the body. The blood travels through blood vessels which are organs of the circulatory system. These are the types of blood vessels: arteries: blood vessels that carry away blood from the heart to the rest of the body arterioles: deliver blood to capillaries; controls how much blood enters the …
What is a portal system? + Example - Socratic
2017年8月3日 · A portal system is defined as a vascular arrangement in which blood from the capillaries of one organ is transported to the capillaries of another organ by connecting veins. In the circulatory system of animals a portal venous system occurs when a capillary bed pools into another capillary bed through veins, without first going through the heart. Both capillary beds …
Excretory System - Anatomy & Physiology - Socratic
Give a detailed explanation. The best videos and questions to learn about Excretory System. Get smarter on Socratic.
Which organ develops first in a human embryo? - Socratic
2016年9月13日 · Heart. The process of cell division and cellular differentiation of embryo during the early stages of development is called embryogenesis. The development of organs start during the third week of embryogenesis and is called organogenesis. The heart is the first functional organ to develop and starts to beat and pump blood at around 21 - 22 days. It develops as a …
Which chamber of the heart receives deoxygenated blood from
2016年2月23日 · Right Atrium Our heart has four chambers, two atria (right and left) and two ventricles (right and left). The right atrium receives the de-oxygenated blood from the body. From the right atrium blood passes to the right ventricle. The right ventricle propels this de-oxygenated blood to the lungs though pulmonary artery, for oxygenation. The deoxygenated blood loses …
What internal organ is below the heart, about level with the belly ...
2015年12月29日 · Explanation: It is either the stomach, the liver, or the intestines. Since you said: about the level with the belly button, it should be the intestines. It should be the intestines. But it could be... It is either the stomach, the liver, or the intestines. Since you said: about the level with the belly button, it should be the intestines.
What are the hollow organs of the body? Is the kidney hollow?
2016年9月23日 · Hollow organs of the body possess lumen or cavity inside, such as stomach or urinary bladder. Kidney is definitely not a hollow organ. Then there are organs with narrow lumen, like trachea, oesophagus and intestine. Even heart has chambers within it. In the picture below, hollow tract of rectum (end of large intestine), cavity of uterus and lumen of urinary bladder are …