levels of biological organisation 3

shepp high sciencelevels of Biological Organisation

Remember these cells?

What are these cells? Write down 3 structures you can see in these cells.

What are these cells? Write down 2 ways these

cells differ from those in the previous slide.

Cells: Are the structural and functional units of all living organisms.

humans have some 75-100 trillion multicellular (more than one cell) unicellular (single celled)

cell membrane

mitochondriavacuole

nucleus

cytoplasm

CHLOROPLAST NUCLEUS VACUOLE CELL WALL CELL MEMBRANE MITOCHONDRIA CYTOPLASM (OOPS ONE IS REPEATED!)

There are many different types of cells in the human body.

blood cells

blood cells

sperm cells

blood cells

sperm cells

egg cell

blood cells

sperm cells

egg cell

neuron (nerve cell)

blood cells

sperm cells

egg cell

neuron (nerve cell)

skin cell

blood cells

sperm cells

egg cell

neuron (nerve cell)

skin cell

fat cell

blood cells

sperm cells

egg cell

neuron (nerve cell)

skin cells

fat cells

pancreatic cell

blood cells

sperm cells

egg cell

neuron (nerve cell)

skin cells

fat cells

pancreatic cells

stomach cell

blood cells

sperm cells

egg cell

neuron (nerve cell)

skin cells

fat cells

pancreatic cells

stomach cell

gland cell

Tissue: Many cells make a tissue. A tissue is a group of cells that perform the same function. There are 5 main tissue types:

muscle; epithelium; connective; nervous; and secretory.

EPITHELIAL TISSUE

EPITHELIAL TISSUE

EPITHELIAL TISSUEsmall intestine

EPITHELIAL TISSUE

EPITHELIAL TISSUE

CONNECTIVE TISSUE

CONNECTIVE TISSUE

CONNECTIVE TISSUE

CONNECTIVE TISSUE

CONNECTIVE TISSUE

MUSCLE TISSUE

MUSCLE TISSUE

MUSCLE TISSUE

MUSCLE TISSUE

MUSCLE TISSUE

stomach

NERVOUS TISSUE

NERVOUS TISSUE

NERVOUS TISSUE

NERVOUS TISSUE

NERVOUS TISSUE

cow’s eye

SECRETORY TISSUE

SECRETORY TISSUE

SECRETORY TISSUEpancreas

SECRETORY TISSUE

horse sweat gland

SECRETORY TISSUE

Organ: A group of different tissues with a specific job.

bladder

bladder

eye

bladder

eye

brain

bladder

eye

brain

stomach

bladder

eye

brain

stomach kidney

bladder

eye

brain

stomach kidneyheart

bladder

eye

brain

stomach kidneyheart

intestines

bladder

eye

brain

stomach kidneyheart

intestinesbone

Organ System: A group of organs that work together to perform a specific job. Many systems come together to allow an organism to survive and reproduce.

digestive

digestive circulatory

digestive circulatory

endocrine

digestive circulatory

endocrine

excretory

digestive circulatory

endocrine

excretory

muscular

digestive circulatory

endocrine

excretory

muscularskeletal

digestive circulatory

endocrine

excretory

muscularskeletal

nervous