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The voyage of a red blood cell
Transcript of The voyage of a red blood cell
The circulatory system consists of the the heart, blood, and blood vessels. It has three very important functions.
A muscular organ that pumps blood throughout the body. It's powerful contractions are the driving force behind the circulatory system, pumping blood through the blood vessels of the body.
The bronchioles continue to divide inside the lungs until they end in millions of tiny air sacs called alveoli. They are grouped into clusters and are surrounded by capillaries of the circulatory system. Oxygen that is carried through the respiratory system dissolves across the alveoli's thin epithelium into the surrounding web of capillaries.
Lungs: Either of two spongy, saclike respiratory organs in most vertebrates, occupying the chest cavity together with the heart and functioning to remove carbon dioxide from the blood and provide it with oxygen.
The voyage of a red blood cell
1. Delivers materials throughout the body, such as oxygen and various important nutrients.
2. Removes waste from the body, such as carbon dioxide.
Red Blood Cells
The major function of red blood cells is to transport oxygen through the body.
White blood cell, a blood cell that protects against infection and attacks parasites and bacteria. There are several types of white blood cells those to help fight infections, some injest bacteria or debris from our dead cells. While others help produce antibodies that fight foreign substances and invaders. White blood cells are produced in bone marrow and then transported throughout the body in the blood. These cells spend a lot of time outside of the blood vessels in the interstital fluid fighting pathogens.
3. fights disease and seals cut to prevent blood loss.
Oxygenated blood: oxygenated has just been filled with oxygen from the lungs.
Deoxgenated blood: Deoxygenated blood travels from the body back to the lungs to have oxygen resupplied
Pulmonary Circulation: The right side
of the heart takes in blood that is reforming from the body and is low in oxygen. In the capillaries of the lungs carbon dioxide waste from the cells diffutes out of the blood and oxygen form the inhaled air is absorbed into the blood. The new oxygen rich blood then flows into the left side of the heart to began the second pathway.
Systemic Circulation: Once the oxygenated blood
enters the left side of the heart it is pumped out to the rest of the body. As the blood circulates through the body, cells absorb much of the oxygen while disposing the carbon dioxide into the blood. the new deoxygenated blood returns to the right side of the heart to start on the pulmonary circulation pathway again.
Blood Vessels: Blood moves through the circulatory system through three different types if blood vessels; arteries, capillaries, and veins.
Arteries: Is a large blood vessel that carries oxygenated blood out from the heart. They have thick flexible walls in order to withstand the strong pressure produces as the heart pumps blood through them.
Capillaries: Are the smallest blood vessels. Most capillaries are so narrow that blood cells travel through a single file. The thin walls of these narrow vessels allow gas exchange to occur.
Veins: After blood passes through the capillaries it returns to the heart through veins, flowing against gravity. Many veins are located between skeletal muscles; the contracting muscles squeeze the veins often contain valves to ensure that blood continues to flow in only one direction.
The Major components of blood are plasma.
Plasma: Is a liquid with variety of ions, proteins, and other solutes dissolved in water. The kidneys work to maintain a balance of concentrations of the solutes dissolved in the plasma ( Important for the pH balance and homeostasis most nutrients and waste products are dissolved in the plasma as they are transported through the blood vessels of the body.
Hemoglobin: an iron- containing protein found in red blood cells that binds to oxygen in order to transport it throughout the body.
Platelet: Cell fragment released by bone marrow that helps in blood clotting , are not true cells , are small pieces that pinch off of large cells in the bone marrow. They play an important role in blood clotting formed by tiny substanced called platelets in order to stop bleeding. Platelets adhere to the damaged connective tissue, dumping together to form a plug. They also signal for proteins and vitamins in the plasma to work together to reinforce the mending skin.
Cellular respiration: is a process that occurs at the cellular level to convert biochemical energy from food and nutrients into chemical energy (ATP) that can be used by the cell. Oxygen is a need reactant in this process , while carbon dioxide is produces as a waste product.
Blood cell that contains hemoglobin and carries oxygen with about 25 trillion in the body's 5 liters of blood . They are shaped like flattened disks that are thinner in the center than at the edge. Also they lack mitochondria as they generate their ATP through anaerobic respiration