Multicellular organisms
What are the three types of connective tissue?
- loose connective tissue - fibrous connective tissue - adipose connective tissue
What are the four tissue types?
1. Connective tissue - provides support and holds various body parts together 2. Epithelial tissue - protects organs, lines body cavities, covers surfaces of body 3. Nervous tissue - provided communication between all body structures 4. Muscles tissue - made up of very thin and very long thread like cells called muscle fibres
What is a specialised cell?
A cell that possesses specific features that well- suit it to its specific function
What are some advantages and disadvantages of specialised cells?
Advantages: - increases efficiency (specific function) - reduces duplication effort Disadvantages: - totally dependent on activities of other cells to perform tasks they cannot - if they are isolated from certain cells, they will not be able to function and will die.
What are some advantages and disadvantages of being multicellular?
Advantages: - live for longer - there are many cells; if one dies they have others to replace it - contains specialised cells - protection-less likely to be eaten - can live in a variety of habitats - can perform many metabolic processes due to complex structure Disadvantages: - cannot live independently of other cells - require more energy to function
What are some advantages and disadvantages of being unicellular?
Advantages: - small and simple - all functions required to survive are capable of that one cell - fast exchange of materials by diffusion - fast reproduction Disadvantages: - more susceptible to predation - don't live as long because if that cell dies, the whole organism dies - limited amount of metabolic activities can occur in the cell at one time due to small size
What is a multicellular organism?
An organism consisting of more than one cell
What is a unicellular organism?
An organism made up of a single cell
What is a stem cell?
An unspecialised, mature cell, capable of being transformed into different kinds of unspecialised, differentiated cells
What is differentiation?
The process in which cells become more specialised as they mature
