Growth, Healing and Replication The Cell Cycle

We are constantly producing cells! 300 million new cells a minute… But that’s not easy to see! FACT:

Skin Cells Constantly regenerating – we shed millions of cells per hour 70% of the dust in your home

…some animals shed skin differently!

We produce new cells to close cuts and wounds as well. New cells are how our body heals itself.

New cells make our hair and nails grow too!

While the growth process slows down after puberty, cells continue to be created to replace cells that become worn out. Red blood cells last about 120 days Intestinal lining cells last 3 days Stomach lining cells last 2 days Liver cells last 200 days Skin cells last 20 days Brain cells last days

Yummy Mummy Exercise!!!

The Cell Cycle

DNA Replication:

Worksheet!

The Cell Cycle The cell cycle is broken into three main components: Interphase Mitosis Cytokinesis

Interphase The longest portion of the cell cycle. During this phase, the cell increases in size and makes the proteins necessary for the cell to function. Towards the end, some organelles start to duplicate, and the DNA begins to uncoil or unzip itself to make a duplicate copy of DNA. After the DNA is replicated, the cell continues to grow and store proteins for the future “Daughter Cells”. Daugher Cells: two identical cells which are created from a parent cell.

Mitosis I – PMAT -- What does that stand for? Interphase Prophase Metaphase Anaphase Telophase

Mitosis – Continued Mitosis is the process by which a parent cell divides into two identical daughter cells. Sometimes, there are errors during this process which will result in genetic anomalies. During this process, replicated chromosomes (which are actually two chromatids held together by a centromere) are separated and divided into two Daughter Cells.

Citokynesis What is known as cell pinching. In this process, the swollen cell begins to pinch at the equator, separating the cytoplasm and its contents into two new cells.

The Cancer Poster - Wanted Top of poster: “Wanted” Photo or drawing of the cancer or its representation General write-up about cancer Description of this particular cancer Description of where it was “last seen” Reward for a cure for the cancer

The Mitosis Song Competition Pick your favourite song. Transform it into a mitosis anthem. Winner will be selected based on How good the song sounds How many facts you put in the song The most complete song that still sounds good wins. Use your book as reference!

In Cell Division….