Organisation of the organism Flashcards
(23 cards)
What do almost all cells contain what in cytoplasm
Rough endoplasmic reticulum and vesicles
What do all cells except those of prokaryote
mitochondria and rough endoplasmic reticulum
What do cells with high levels of metabolism require
more mitochondria
o Cell membrane
differentially or partially permeable to allow certain substances to enter and leave the cell.
o Nucleus:
contains DNA and controls the cell
o Cytoplasm:
where chemical reactions take place
o Chloroplast
contain chlorophyll, which absorbs light
energy for photosynthesis
o Cell wall:
rigid to keep shape of cell
o Vacuole:
stores food & water & helps to maintain
shape of cell
o Mitochondria
: organelle where aerobic respiration
happens
o Ribosome
: makes protein and can be found floating
within the cytoplasm
Ciliated cells
To move and push mucus
Have cilia (root hairs)
have mitochondria
Root hair cells
To absorb water and minerals from ground
Are elongated shape to increase surface
Xylem vessel
to transport minerals and water
Have no cytoplasm for water to move easily
No cross walls to long continuous tube
Lignin to toughen us and water proof
Palisade cells
to photosynthesize
Have regular shape so more fit in a small area
Have a lot to chloroplast
Nerve cells
Conduct impulses
Are long so can contact distant parts
have sheath for insulation
Red blood cells
Transport oxygen Have haemoglobin Has a biconcave shape no nucleus for more space flexible
sperm and egg cells
Reproduction
Sperm has tail
mitochondria
and acrosome to dissolve egg membrane
Orgenelle
a specialized part in cytoplasm the performs its own function
Cell
Smallest unit in a living structure that operates independently
Tissue
A group of cells with similar structures working together to perform a specific function e.g muscle tissue
Organ
a structure made up of a group of tissues working together to perform a specific function e.g heart
Organ system
Group of organs with related functions working together to perform a function e.g circulatory system
