Functions of Circulatory System Video
Types of Cells
Red Blood Cells:
Red Blood Cells make up 45% of the blood and have a shape called a biconcave disc. They are produced in bone marrow and contain hemoglobin to maintain the red color. Their job is to transport oxygen and nutrients to the body and get rid of waste like CO2.
White Blood Cells:
White Blood Cells make up 2% of our blood and they help the body defend against diseases by fighting bacteria. There are 3 types of white blood cells that defend against different diseases (Granulocytes, Monocytes, and Lymphocytes).
Platelets:
Platelets are small blood fragments that heal wounds by making clots in the blood. When tissues are cut, they build over the wound and work with proteins to make a web (which turns to a scab) preventing more blood loss.
Plasma:
Plasma is 53% of blood and it gives it a liquid consistency. It contains sugars and calcium but it is mostly water. It is also made in the liver.
Types of Tissue
Ephithelial Tissue:
A layer a protective tissue covering the entire body. It usually sits on top of connective tissue and can be found in the structure of arteries, veins, heart and capillaries.
Muscle Tissue:
Muscle tissue is made up of muscle cells which allows the muscles to contract and move our body. It creates involuntary movement inside our bodies in every organ system. The heart, which is the main part of our circulatory system, is considered a muscle and is largely made up of muscle tissue.
Connective tissue:
The "glue" that holds our body together because it is the most common type of tissue in our body. Its job is to connect and support other tissues and organs. This tissue makes up the structure of all of the organ systems.
Nervous tissue:
The nervous tissue's job is to react quickly to stimuli and send impulses to other organs throughout our body. It is made up of a type of cell called neurons. They are important because they help the brain transmit messages to all of the parts or the circulatory system.