tissues and organs

Plants only have chloroplasts if

They need to absorb light

Tissue

A group of cells that are working together

Organ

A group of 2+ types of tissues working together to perform a specific function

Organ system

A group of organs which work together to form organisms

Organism

A group of organ systems working together to create the full living thing

Why are muscles red?

They are actualy white, but to contract to move, they need energy in the form of oxygen, which comes from the blood

Types of tissues

Muscular, glandular, epithelial

Organs in the digestives system

Small and large intestines, mouth, teeth, tongue, salivary glands, oesophagus, stomach, rectum, anus.

What is the aim of digestion

The get nutrients/ compounds form food

The intestines are long to

Maximise time and area so that they can absorb more nutrients

The gallbladder and liver produce alkaline bile so that

It can mix with the stomach acids to emulsify the contents and prevent the acid from burning through the intestines.