Levels of Organisation - U1

Atoms in living matter are called bioelements, which then form biomolecules.

Atoms come together to form molecules, and they're held together by chemical bonds.

Carbon, Hydrogen, Oxygen and Nitrogen.

Inorganic molecules can be found in both living and non-living matter, but organic molecules are only found in living matter.

A group of cells which perform the same function.

A group of tissues with the same function joing together to form an organ.

Organs join together to form organ systems.

Organ systems (with different functions) make a multicellular organism.

The main difference is that eukaryotic cells have a nucleus whilst prokaryotic cells don't. Eukaryotic cells are more complex and have organelles, whilst prokaryotic cells are simpler and don't have organelles.

A thin layer that protects the cell and regulates exchanges of substances.

The nucleus contains genetic material and organises the cell's activity.

Cytoplasm is a thick liquid that contains cell organelles. It's where chemical reactions take place.

Centrioles, ribosomes and cytoskeleton.

Mitochondria, lysosomes, endoplasmic reticulum, vesicles and golgi apparatus.

Cell differentiation is the process in which cells change its shape and structure in order to perform a specific function.

Covering epithelium covers and protects outside surfaces and internal cavities. Glandular epithelium forms glands.

Reticular connective tissue has an extensive gel-like matrix, it fills in organs and the spaces between them and forms tendons. Adipose tissue has a matrix with low levels of intercellular substance, it's an energy reserve and a thermal insulator. Cartilaginous tissue has a solid and elastic matrix, and covers the joints to prevent deterioration. Osseous tissue has solid and hard matrix, and forms bones. Blood has a liquid matrix called plasma.

Skeletal striated muscle tissue forms the muscles of the locomotor system and can be moved voluntarily. Cardiac striated muscle tissue forms the walls of the heart. It contracts involuntarily. Smooth muscle tissue is found in the walls of various organs like the stomach and bladder. It contracts involuntarily.

Neurons perceive and react to stimuli, and glial cells protect and give them nutrients.

This system transforms food into nutrients.

This system exchanges oxygen and carbon dioxide.

This system uses blood to transport substances throughout the body.

The lymphatic system transports substances along with the circulatory system.

This system takes waste from the blood and eliminates them.

This system receives information from the outside environment and generate signals, which then uses to coordinate the body.

This system works with the nervous system to induce responses in certain organs.

These systems they make up the locomotor system that generates movement.

This system produces female gametes and also protects and nurtures the embryo.

This system produces male gametes.

Homeostasis is all the physiological processes needed to keep the internal environment stable.

The optical microscope has a lower magnification than the electron. The electron microscope can only be used to examine