Tissues Aimee Robinson unit 5 p2

1. structure

   Nota:

   • This is located in the lining of sweat glands, mammary glands and the female urethra. its structure consists of an outer layer and an inner layer locked together. they have a square-like shape. Due to it assisting in secretion and absorption it is also found in the salivary glands etc that are specialised in diffusion.
2. function

   Nota:

   • The main function is to assist movement of nutrients and advance absorption within the body. It also assists in secretion which is why it is specialised in diffusion such as in the kidneys when extraction of waste and bacteria occurs these simple cuboidal cells assist this and allow this to take place.

1. structure

   Nota:

   • This can be found in your alveoli sacs and in your capillaries. It is sheets of thin cells that are delicate.
2. function

   Nota:

   • Due to its thin sheets it allows oxygen to pass through your alveoli sacs into the blood stream for respiration with diffusion. The capillary walls let oxygen, carbon dioxide and glucose pass through it as well.

1. structure

   Nota:

   • This can be found in the trachea and bronchi and look like hairy cells. the columnar is what is found within the trachea and has the hairy like cells attached which are ciliated.
2. function

   Nota:

   • The columnar epithelia have goblet cells which produce mucus. This mucus traps dust, bacteria and viruses. The hairs on top of the columnar epithelia then waft these back out of your body. For example in your trachea mucus can then leave your body through your mouth.

1. function

   Nota:

   • It lines the moist cavities or tubes within the body. It provides protection.
2. structure

   Nota:

   • This is found in the mouth, cornea and oesophagus. This is similar to keratinised compound epithelial tissue in its structure. It has a top layer and a bottom layer which replaces the top layer with the cells made from cuboidal cells underneath.

1. structure

   Nota:

   • This has two main layers and within this other separate ones. the top layer is cells that are dead and the layer underneath are cuboidal and these repeatedly divide to replace the surface cells.
2. function

   Nota:

   • This is skin, these cells reproduce all the time and dead skin cells fall off which is what we know as dust. The skins function itself is to protect everything underneath it, so all our blood vessels, bones, organs etc.

Nota:

• Cardiac tissue is the only type of tissue that is located within the heart. The cardiac tissue makes up majority of the mass of the heart. The cardiac tissue is the same size of your fist. This cardiac tissue is not under conscious control which means you don't have any control over it which means it is myogenic. 

Nota:

• The main function of the cardiac muscle is to contract myogenically in order for the blood to pump from the heart throughout the circulatory system. However although the pumping of the heart is myogenic there is also some hormones which help with this as well as homeostatis which regulates the overall condition of the boo the hormone which it is being subject to. 

Nota:

• A skeletal muscle is a muscle which is attached to the bone, for example back muscles, triceps, biceps etc. An individual skeletal muscle is made up of hundreds/ thousands of muscle fibres. Striated muscle is shaped in stripes.

Nota:

• The function is to provide skeletal movement. The muscle also provides contractions within the muscle which allows it to move the bones. It also supports soft tissue.

Nota:

• This is shaped like a rugby ball, it can be found in the intestine, oesophagus, walls of blood vessels etc. It consists with a complex make.

Nota:

• The main function is to help organs contract such as the bladder. For example when a woman is giving birth the smooth muscles in the uterus will contract which will help push the baby out. Smooth muscle is innervated by the nerves In the autonomic nervous system as it is not under conscious control.

Nota:

• Due to its sticky white material it acts as glue almost and binds muscle groups, blood vessels and nerves together.

Nota:

• It is a sticky white material, it is also stretchy tissue due to it containing collagen and elastin fibres.

Nota:

• This is similar in structure to areolar connective tissue, however it has more fatty cells inside which is why it is used for insulin and storage.

Nota:

• This acts almost as an insulator, it helps prevent heat loss through the skin. It also acts as 'padding' for example the kidneys and other major organs. It also is a means of energy.

Nota:

• We need our bones in order to do anything such as movement. for example if we wanted to pick something up we need to be able to bend with our knees, straighten our backs and move the bones in our hand and arms to do this. The connective tissue allows our bones to do this and assists it. It also protects us.

Nota:

• This can be found the sternum, it is strong and is where we can find bone marrow it also stors calcium in order for your bone cells to use.

Nota:

• To transport cells, nutrients, hormones and waste keeping all of the body connected. It helps us fight infection and protect the body. for example if you cut yourself your white blood cells would rush to this and act as a shield from infection.

Nota:

• There are 45% red blood cells, <1% white and platelets and 55% platelets. this carries oxygenated and deoxygenated blood around the body for respiration.

Nota:

• Due to the three types within cartilage, the elastic is to allow a certain amount of give when it is pulled for example if your ear was pulled this elasticity would stop it from ripping off. The fibro within the cartilage can withstand a lot of pressure and is found within the knee joints and essentially stops your knees from grinding together. The hyaline is the most common type and helps with plyable support and connects your ribs to your sternum.

Nota:

• This does not have any tendons or nerves. there are three main types hyaline, elastic and fibro. fibro for example is very strong and can be found in vertibrey and knee joints. hyaline can be found at the end of your nose and within the ribs and sternum and elastic can be found within the ear etc.

Nota:

• Looks similar to a plant in the fact that it has branches coming off which are the nerve cells which pick up the information and the trunk of the plant which is the nucleus transmits the information and receives this. It almost has a tail like shape to it as well.

Nota:

• Neurones are nerve cells and carry electrical signal around the body. there are different types, sensory or afferent which carry signals to the receptors, motor or efferent which make muscles contract.

Nota:

• There isn't a specific identical look due to the majority of neuroglia however they do all have a similar looking processor.

Nota:

• These acts like a support system for the neurones as they do not transmit nerve impulses.  They supply nutrients and proteins for the neurones. They also act as a shield and protects CNS neurones from disease.