Unit 2.4 Cell to Organism

Pregunta	Respuesta
Unit 2.4 Cell to Organism	Science Br Oussama
Define Multicellular Organisms	Living things made up of many cells.
What are tissues?	Tissues are similar specialised cells working together to complete a specific task.
What are Organs?	Tissues are organised into organs.An organ is a structure that contains at least two different types of tissue working together to complete a task.
What are Organ systems?	Organs are arranged into organ systems.Organ systems have two or more organs that work together.
How many types of tissues are there?	Four
What are the names of those tissues?	Epithelial, Connective, Muscle and Nerve tissue
What is Epithelial tissue made up of?	It's made up of cells that form surfaces over other organs.
Which organ is best known for its Epithelial tissue?	The skin, it has an outer layer of Epithelial tissue called epidermis.
What other parts of the body is covered with epidermis?	Inside the mouth, digestive system & the Reproductive system
What does the connective tissue do?	It supports and holds together other tissues.
What are some examples of connective tissue	Fat, Bone, Cartilage, Ligament, and Tendon
What does Ligament do?	It hold your bones together at the joints.
What do Tendons do?	It joins muscles to bones.
What do Muscle tissues do?	They contract, become shorter and fatter.
What do Nerve cells do?	They can send e;electrical signals around the body.
What are organs?	Tissues are grouped together into organs. Different tissues contribute to the job that the organ has to do.
Name a couple of organs in the human body.	Kidney, Heart, Liver and skin.
Which organ is the largest?	The skin.
Why does the body need blood?	Blood carries nutrients and oxygen to the cells, and carries wastes away from the cells.
What happens in the stomach and small intestine?	Food goes through chemical changes so the body can use it.
Explain the Respiratory system	It gets oxygen from air into your body and gets rid of carbon dioxide.
What is the skeleton system?	The skeletons and muscles.
What does the Excretory system do?	Gets rid of wastes from the body.
Explain what the Nervous system does	It sends message from the body to then brain, then from the brain to other parts of body including the muscles.
Explain the Reproductive system	It creates and transports specialised cells necessary for reproduction. In females, it provides structures and nutrients for development of baby.
What are essential functions for the plant	Photosynthesis, Transport and reproduction
Define the Vascular tissue	Its made up of cells that create hollow tubes for the transport of nutrients and other substances in fluid.
Define Xylem	Cells in a plant that carry water from the roots to the rest of the plant
Name the main organs in a plant	Roots, Stems and leaves
Define Photosynthesis	The process used by plants to make food from water and carbon dioxide using energy from the sun.
What carries water from soil to the plant?	Roots.

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