2What makes up a cell?Even though early scientists like Robert Hook could see cells through their microscopes, they had no idea how complex a cell is.From their perspective, a cell was a simple block with a spot inside the core, which they called the nucleus.
3What makes up a cell?Let’s take a look at the anatomy of a cell. Cells can come in many shapes and sizes.
4What makes up a cell?While they are shaped differently, cells have similar parts.Cell MembraneThe cell membrane is the gatekeeper of the cell, letting substances to pass in and out of the cell.
5What makes up a cell?Inside the cell membrane are tiny parts called organelles that each have a special job.CytoplasmThe organelles float in a nutrient filled substance called cytoplasm.
6What makes up a cell? The cell requires power to work. Mitochondria Nutrients from the food you eat are transformed into fuel that the mitochondria uses to power the cell.Mostly, the fuel comes from glucose, a type of sugar.
7What makes up a cell? The cell also needs protection. Lysosomes The lysosomes destroy bacteria that enters the cell.They also break down old organelles and send them out of the cell.
8What makes up a cell? Lysosomes The lysosomes also break down nutrients from the food you eat – like protien, the nutrient in meat, and carbohydrates, the nutrient in potatoes – into pieces the cell can use.
9What makes up a cell? Golgi bodies The cell needs a supply of proteins and fat.These nutrients are stored in the Golgi bodies.The Golgi bodies send the supplies where they are needed.
10Pause for a minute.What have you learned so far?
11What makes up a cell? Endoplasmic Reticulum When the cell needs chemicals or to eliminate waste, the endoplasmic reticulum sorts what needs to go where and sends it.Waste is sent from the endoplasmic reticulum out of the cell.
12What makes up a cell? Endoplasmic Reticulum Because endoplasmic reticulum is difficult to say, most people nickname it as the ER.Each cell will have more ER than Golgi bodies.Some ER are studded with beads called ribosomes.
13What makes up a cell? Centrioles Adults have more cells than children because as you grow, your body produces more cells.Your body also needs to repair damaged cells from when you have an accident.
14What makes up a cell? Centrioles Centrioles are the special organelles that can help a cell copy itself, or reproduce.
15What makes up a cell? Nucleus The nucleus is the largest organelle within a cell.The outside of the nucleus is a thick, porous nuclear membrane that holds the nucleus in shape.
16What makes up a cell? Nucleus Inside the nucleus is a smaller ball called the nucleolus.The nucleolus make the ribosomes that are sometimes found on the ER.
17Pause for a minute.Talk about what have you learned so far.
18What is inside the nucleus? DNADeoxyribonucleic acid, also called DNA, is a tiny molecule that contains all the information about a person.DNA can be found in almost every cell in your body.
19What is inside the nucleus? DNAThe information within the DNA is called genes.The genes are made up of nucleotides, which scientists refer to as the letters that spell out what a person will be like.
20What is inside the nucleus? DNADNA is packaged into groups called chromosomes, and each cell contains 46 chromosomes.Unless the person has a twin, every person’s DNA is unique.
21What is inside the nucleus? How does DNA talk to the rest of the cell when it is inside the nucleus?RNARNA is the messenger.The RNA copies the code in the DNA and takes it to the ribosomes, which then prepares the protein the cell needs.
22Pause for a minute.Talk about what have you learned so far.
23What can a single cell do? An egg is an example of a single cell.However, this one cell can become many cells when it develops into a chick.
24What can a single cell do? Every person starts from a single cell…But the centrioles help the cell to divide to form a baby…
25What can a single cell do? In the beginning, all of the cells are exactly the same.Soon, the cells begin to differentiate, or become different.Cells of the same type gather together to form tissues.
26What can a single cell do? There are four types of tissues.nervous tissue(brain, spinal cord, nerves)muscular tissue(muscles)connective tissue(keeps organs and skin connected)epithelial tissue(skin)
27What can a single cell do? Tissues group together to form organs – like your stomach,Organs connect together to form organ systems – like your digestive system,And it all starts from a single cell.
28Let’s review.Talk about what have you learned today.