Specialized Cells Specialized Cells Specialized Does one thing
- Slides: 13
Specialized Cells
Specialized Cells • Specialized: Does one thing really well • Cells look different because they have different jobs.
Stem cells… not specialized yet! • Stem cells are cells that have not chosen a “job” yet • Once a cell has chosen a job, it can’t change anymore • You have the most stem cells before you are born • Adults still have some stem cells that work to fix damaged tissues and make more stem cells
Stem cells in research • Stem cell research is exciting to scientists because they might be able to use stem cells to fix medical problems • Controversial research because sometimes the stem cells come from fetuses (not always). This is called embryonic stem cell research. • The principal source of human embryonic stem cells is donated embryos from fertility clinics
Fat Cells • Part of connective tissue. • Primary purpose is to store energy for later —if there is not enough food, body uses stored fat
Bone Cells • Provide support for bone structure. • Marrow makes blood cells • Some stem cells in bone marrow!
Blood Cells • Red blood cells carry oxygen to tissues. • White blood cells fight diseases. • Platelets (cell fragments) clog up “leaks” and clot to form scabs
Nerve cells • Carry electrical and chemical signals around the body. • Neurons: nerve cells in the brain
Muscle Cell • Muscle cells are attached to bones and make movement possible • Long and thin • Can stretch and contract like a rubber band
Skin Cells • Protective barrier for waterproofing, block microorganisms and chemicals. • Replicate quickly • Screen harmful UV rays. • Thermostat
Leaf Cells • Regulates exchange of H 20, O 2 and CO 2. • Most of light absorption occurs here in photosynthesis. • Takes a lot of energy to maintain
Root Cells • Absorb water from ground • Underground means no chloroplasts for photosynthesis
Plant trunk and stem cells • Create tubes to carry water up to the leaves and food down to the roots • Strong cell walls— keeps plant standing up.
Figurative language in one thing by one direction
Collections of specialized cells and cell products
Specialized cells in animals
Specialized cells
Speech involving one person example
When a character says one thing but means another
If i could only teach you one thing why god made you
More than one thing
Another one thing riddle
Luke 10
One thing i ask of the lord
When a character says one thing but means the opposite.
Unusual thing one off
Any and everybody
