Cell structure Functions of a human cell:
Nucleus- Regulates all activity as it contains the instructions of the cell.
Mitochondria- Creates energy for the cell by breaking down nutrients. This is called cellular respiration.
Cytoplasm – semi-fluid that allows chemical reactions to take place and helps materials move around the cell. It is mainly made up of water and also contains enzymes, salts and organelles.
Ribosomes- Produce proteins and is usually found in the cytoplasm or on the rough endoplasmic reticulum.
Cell membrane- It protects the interior of the cell by controlling what goes in out of the cell.
Golgi apparatus – Collects simple molecules to combine them together …show more content…
These are the cardiovascular, respiratory, digestive, renal, nervous, endocrine, reproductive- male and female, lymphatic and immune.
The cardiovascular system (CVS)
The main parts of the cardiovascular system are the heart, blood and the blood vessels (arteries and veins). The function of the heart is to pump blood around the body. The function of the blood is to supply nutrients and oxygen to the cell. The blood vessels (arteries and veins) role is to transport blood to and from the heart. However, the general function of CVS is to remove waste products such as CO2 and protect the body, for example the white blood cells in the body. “It also distributes heat around the body and assists in temperature regulation and helps regulate water.”
The respiratory system
The respiratory system maintains oxygen supply to cells and removes CO2 and water from the body. The main parts of the respiratory system is the trachea(windpipe), lungs bronchioles,nose, bronchi, muscle and mouth. Breathing provides oxygen for our bodies and humans need this to sustain. Respiration takes place in the lungs, oxgen enters the nose /mouth then passes through the sinuses (hallow place) which regulates temperature and humidity of the air we breathe. The trachea filters air that is …show more content…
Bacteria and other microbes are picked up in the lymphatic fluid and trapped inside lymph nodes, where they can be attacked and destroyed by white blood cells.”(Better Health Channel, 2014) This system is a part of the circulatory system. Limitations of this system is that it can cause glandular fever, Hodgkin’s disease, swelling and tonsillitis. The function of this system is to transport lymph fluid, which contains white blood cells that get rids of toxins and waste.
The musculo-skeletal system
This system is constructed of bones such as, joints, tendons, ligaments, skeletal muscles, nerves, cartilage, hyaline cartilage, elastic cartilage and fibrocartilage. There are five main functions of the bones, these include:
Providing support for the body, storing minerals and lipids, producing blood cells, protecting body organs and providing power and movement. “Striated muscle fibres are bound together to form muscles that pull bones into different positions by contracting.” (Aldworth, 2010) The immune system
The main function of this system is to protect the body against infections and diseases. The major components of the immune system is the spleen, lymph nodes, bone marrow, lymphocytes, thymus, and leukocytes. Common symptoms that show that the immune system is not functioning properly are fever and