Cell-Tissue-Organ-System

• Cells in multicelullar organisms are grouped together to form more complex structures.

– Tissue: a set of the same type of cells from the

same origin. – Organ: a set of tissues that come together to

perfom a specific function – System: a set of organs, each formed by different

tissues, which take part in one or various functions.

Specialized cells

• Cells divide by cellular division in a multicellular organism.

One daughter cell specializes and the other maintains the

capability of dividing, assuring cellular renovation and the

growth of the organism. Most specialized cells lose the ability

of dividing.

• It does a specific job

• It develops a special shape

• Changes take place in its

cytoplasm. E.i. muscle cells

(mitochondria)

Specialized cell

Highly specialized cell: sperm cell

How do the characteristics

of this cell help it do its

function?

ACTIVITY

Tissues

• Tissues perform specific functions because their cells are

specialized to carry out certain processes.

Different tissues

for different

functions

Movement

Communication

Protection

Secretion

Connection

Support

Reserves

Movement: muscle tissue

Muscle tissue

Skeletal : muscles

Cardiac: heart

Smooth: Involuntary contractions (stomach)

Striated muscular tissue

Skeletal

• Voluntary contractions

• Makes up the muscles that together with the bone produces movement.

Heart

• Involuntary contractions

• Makes up the muscle of the heart walls.

Striated muscular tissue

Smooth muscle tissue

• Involuntary contractions

• Makes up the wall of many organs.

Communication: nerve tissue

• Coordinates the function of all the organs • The specialized cell is a neuron.

Connection: Connective tissues

Loose connective tissue: It’s the fill-in tissue. It takes up the spaces between organs and other tissues.

Bone tissue: basic component of adult bones. It is the strongest type of connective tissue because it contains a mineral called calcium

Adipose tissue: accumulates fat in the cells and

contains a small amount of fibers.

Cartilage tissue: main component of embryonic

skeleton. In adults there is cartilage in joints, the

traquea, the nose and ears and between discs in

the spinal column.

Connection: Connective tissues

Protection: Epithelial tissue

• Covers and protects our body as well as our internal cavities.

Tissues make Organs

Organs make Systems

Systems The different systems are responsible for carrying out the 3 vital functions of living

organisms.

NUTRITION REPRODUCTION REACTION

Digestive System

Respiratory System

Circulatory System

Excretory System

Reproductive System Sensory Organs

Nervous System

Endocrine System

Muscular and Skeletal