P2 Outline the Main Tissues Of The Body Epithelial Epithelial tissue is basically the linings of both the internal and external surfaces of the body and can be divided into two groups. The groups depend upon the number of layers of which it is composed. These two groups are simple epithelial and compound. Simple squamous are thin, flat plates and their main function is osmosis (which is the passage of water molecules from a region of low concentration to one of high concentration through a semi-permeable membrane) and diffusion (which is the passage of molecules from a high concentration to a low concentration). They form the lining of cavities such as the mouth, blood capillaries, heart and lung alveoli and make up the outer layers of the skin.
http://www.bio.davidson.edu/people/kabernd/berndcv/lab/epithelialinfoweb/simple%20squamous%20epithelium.html Cubodial Epithelial Cells Cubodial cells are obviously shaped like a cube, hence the name. Even though they may look hexagon in shape at the surface, if we cut into them we can see they are cubed in shape and contain a spherical nucleus. These types of tissue cells are classes as simple as they only consist of a single layer of cells. Those cells with numerous layers would be considered complex tissue cells. The function of the cuboidal cell is to provide a layer of protection against abrasions, foreign objects, invading bacteria
Place tubes on ice. 4. Use a sterile plastic inoculating loop to transfer one or two large colonies of E. coli cells from the starter plate to the +BLU tube. a) Be careful not to transfer any agar from the plate along with cell mass. b) Immerse loop tip in calcium chloride solution, and vigorously tap against wall of tube to dislodge cell mass.
Compound Epithelium – this type of epithelial tissue is made to withstand wear and tear. It is composed by several layers of cells which is the reason for the name of the cell. The epithelium may or may not be keratinised which contains a tough, resistant protein called keratin for example skin or unkeratinised which is what the lining of your mouth is made up of. Unstriated muscle – this is the type of muscle which still contains protein filaments but they do not lie in an orderly pattern as with striated muscle. In this type of muscle the fibres are spindle shaped and generally have a central nucleus, and dove-tail into each other.
1. Describe the physical characteristics and primary function of red blood cells? What is hemoglobin and what specific tests involving hemoglobin can help with the diagnosis of anemia? How does iron deficiency play a role in anemia? Red blood cell shapes like donate and it contains stretchable cells, which makes it flexible and flat so it can go through small areas.
1.1 Identify the differences between bacteria, viruses, fungi and parasites Bacteria - a single cell micro-organism that gets its nutrition from its surroundings and can only be seen under a microscope. Viruses - are disease producing agents far smaller than bacteria. They are enclosed in a protein coating which makes them more difficult to destroy. Fungi – are included in the plant kingdom but are quite different from green plants. The basic unit of a fungus is a hypha which is a hollow tube.
Some fungi have beneficial uses. For example, penicillin. Fungi are also essential in making certain foods, such as bread and cheese. Certain types of Fungi can cause illness such as Candida which is a yeast that can cause infections such as thrush. Parasites A parasite is a tiny organism that lives in or on a host (A body) which they use in order to feed.
Make sure that you use colour and make the poster clear, attractive and interesting. P2 Outline the structure of the main tissues of the body Produce a written assignment that shows an understanding of the main tissue types and the roles they play in two named organs. Two organs you could choose might be the stomach and the skin. Here are examples of tissues types that occur in these two organs: 1. The stomach has three layers of non-striated muscle in its wall and an inner lining of columnar epithelium with goblet cells.
The exterior surface of the plasma membrane can contain carbohydrates. How are the peripheral proteins attached to membrane? Peripheral (extrinsic) proteins are associated with the surface of the bilayer surface via ionic interactions (electrostatic) and H bonds. They do not extend into the hydrophobic interior and can be removed by agents that disrupt ionic interactions and H bonds, such as high salt concentrations, urea, or extremes of pH. How do proteins associate with cell membrane?
The epidermis is very thin, only 0.2 millimeters thick. It protects the deeper layers of skin and the organs of the body from the environment. Keratinocytes are the main cell type of the epidermis. They make an important protein called keratin. They help protect the rest of the body.