Cell structure

CYTOPLASM

• consists of a jelly-like matrix suspended between plasma membrane and nuclear membrane.
• contains of organic and inorganic substances.

NUCLEUS

• contains the nucleoplasma, necleolus and chromosomes.

PLASMA MEMBRANE

• made of proteins and phospholipids.
• semi permeable membrane.

CELL WALL

• composed of cellulose, a tough and fibrous carbohydrate.

VACUOLE

• contain fluid sac called cell sap.
• surrounded by tonoplast and semi permeable membrane.
• young plant cell has numerous small vacuoles where as matured plant cell has large vacuoles.

MITOCHONDRIA

• involved in cellular respiration.
• broken down the food substances with the help of respiration enzymes in the mitochondria.

RIBOSOMES

• attached to the surface of rough endoplasmic reticulum or suspended freely in the cytoplasm.

ENDOPLASMIC RETICULUM

• two types of endoplasmic reticulum

1. rough endoplasmic reticulum
2. smooth endoplasmic reticulum

GOLGI APPARATUS

• the golgi is composed of membrane-bound stacks known as cisternae.

LYSOSOME

• membrane-bound sacs that contains hydrolytic enzymes.

CENTRIOLES

• composed of complex arrangement microtubules and located outside the nucleus.

CHLOROPLAST

• contain the green pigment chlorophyll.