Group 2 :Typical Animal Cell

Done By : Lisa Lim, Jill Oh, Esther Soh, Ysabel

Group Members : Julia, Sasha, Rachel Ho, Kaiwen

Group7-Xylem vessel

A vessel element is one of the cell types found in xylem, the water conducting tissue of plants. In secondary xylem, a vessel element originates from a fusiform initial in the cambium, at maturity the protoplast dies and disappears, but the lignified cell walls persist.At both ends there are openings that connect the individual vessel elements. These are called perforations or perforation plates. These perforations may have a variety of shapes: the most common are the simple perforation (a simple opening) and the scalariform perforation (several elongated openings on top of each other in a ladder-like design). Other types include the foraminate perforation plate (several round openings) and reticulate perforation plate (net-like pattern, with many openings). The side walls will have pits, and may have spiral thickenings.

The vascular bundle in the stem of plants is composed of the xylem and phloem tubes. The xylem’s main function is to transport water and mineral salts from the roots to the rest of the plant. The xylem is composed of xylem vessels, xylem tracheids, xylem fibres and xylem parenchyma. The xylem vessel is a long, hollow tube stretching fromthe root to the leaf. It is a structure made up of many dead cellsknown as vessel elements. The cells are arranged end to end and thecross-walls dissolve completely or have simple or complex perforationplates between successive cells. The secondary walls of vessels are impregnated with lignin and are thickened unevenly. Lignin may bedeposited in the form of rings or spirals, to prevent the collapse of the vessel and to provide mechanical support to the plan. The xylem vessel also has an empty lumen without protoplasm, to reduce resistance to water flowing through the xylem.

The Root Hair Cell...

Here is the wonderful root hair cell that group 10 worked hard for. Enjoy. I'm sorry there's no information but all of it should be found in your textbook.

These are pictures of a red blood cell.
Red blood cells in blood contain the red pigment called haemoglobin.
Haemoglobin combines with oxygen, which is transported around the body.
Done by: Aarthi, Jia Xin, Venetia and Vicki.

Group 1 - Animal Cell (picture)

This is a typical animal cell. It consists of a nucleus, chromosomes, tiny vacuoles, cytoplasm and a cell membrane.

-nucleus -> The nucleus controls all activities that is happening in the cell.

-cytoplasm -> The cytoplasm contains chemicals and tiny structures that carry out a special function.

-chromosomes -> There are 46 chromosomes in each cell.

-cell membrane -> The cell membrane controls things that goes in and out of the cell.

Done by: Group 1 : Alia(1), Ashmika(4), Samantha(28) and Zhou Quan(38)

Group 3-Plant Cell

The pictures are models of a plant cell.The plant cell consists of a thick cellulose cell wall,a soft,thin and partially permeable cell membrane,cytoplasm,a nucleus which contains DNA,chloroplasts,a single large vacuole,starch grains which stores food and mitochondrion.The plant cell,unlike the animal cell,has a cell wall which gives the plant its shape and supports it and chloroplasts which enable plants to produce food through photosynthesis.

Done by:Group 3-Rachel Tsang,Lee Zuo Qi,Simone Lam