Cell Diversity

 Cell Diversity

By Naomi Keddy

Tissue is a group of similar cells modified to carry out the same function

Types of plant tissues:

·         Dermal tissue: surrounds and protects the plant. Eg Epidermis

·         Vascular Tissue: transports minerals in the plants. Eg Xylem; transports water and dissolved minerals and Phloem transports food.

Four Types of animal tissues:

·         Connective tissue: consists of cells dispersed in a matrix and surrounds its and supports the body.

Types of connective tissue

-Dense Connective tissue

-Adipose tissue

-Areolar tissue

-Compact bone

-Blood

Examples of connective tissue:

1.       Cartilage: Provides strength and flexibility

2.       Bone: Allows movement, Stores calcium and contains forming blood cells

3.       Blood: Transports oxygen and carbon dioxide.

Tissue Culture: is the growth of cells in sterile nutrient medium outside the body.

In vitro means outside of the body

Micropropagation: is the growth of large numbers of cells of a parent plant.

Monoclonal antibodies: combine with a specific type of antigen, this may be used to attach to and show the presence of antigens on cancer cells.

Growth of Skin: Patients skin grown outside of the body and new skin is grafted onto the wound, this is called a skin graft and is often used on badly burnt patients due the fact the their skin tissue too bad damaged to repair itself.

Conditions necessary for Tissue growth

• Oxygen

• Nutrients

• Growth factors and hormones

• Correct pH

• Optimum temperature

• Sterile conditions

• Freedom from competition

An Organ: is made up of a number of tissues working together to carry out the same function.

An Organ System: contains a number of working organs working together to carry one or more functions.