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Cardiomyocytes, found in animals, are the individual cells that make up the cardiac muscle. The main job of cardiac muscle cells is to contract in order to pump blood through the circulatory system. They are made of small tube-like structures that pass within the cells. Cardiac muscles make up the thick middle layer of the heart. Neighbouring cardiomyocytes are linked together at their ends to ensure that they contract synchronously.

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Smooth muscle cells are responsible for the involuntary contractions of the hollow organs in the body, such as the liver, pancreas, and intestines. The do this to control the diameter, wall movement, and wall stiffness of these organs.

Some of the features of smooth muscle cells that allow them to contract simultaneously :

- elastic
- not striated
- spindle shaped
- arranged in sheets

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ONLY IN ANIMALS
Function:
-receive and transmit messages between the brain, spinal cord, and other parts of the body
-releases chemical regulations
-conduct electrochemical impulses
-responds to chemical and physical stimuli
-relays info about the external environment
Features and what they do
-Dendrites
-receive chemical impulses, convert them to electrical impulses to transmit to the cell body
-Cell Body/Soma
-Contains specialized organelles for protein and energy production
-Axon
-carries info through cell
Axon Terminal
-the endpoint of axon
-Myelin Sheath
-insulated layer allows nerve impulses to be rapidly

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Red blood cells, also referred to as red cells, red blood corpuscles (in humans or other animals not having nucleus in red blood cells), haematids, erythroid cells or erythrocytes, are the most common type of blood cell and the vertebrate's principal means of delivering oxygen to the body tissues—via blood flow through the circulatory systems. RBCs take up oxygen in the lungs, or in fish the gills, and release it into tissues while squeezing through the body's capillaries.

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Smooth muscle contains thick and thin filaments. On microscopic examination, it also appears homogenous. Their major role of smooth muscle cells is to control the diameter, wall movement, and wall stiffness of hollow organs, which are under the control of external stimuli released from autonomous nerves, adjacent cells or distant sites.

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Function: the cells responsible for receiving sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.

Features: consists of a large cell body and nerve fibers—one elongated extension (axon) for sending impulses and usually many branches (dendrites) for receiving impulses.

Specialized projections called axons allow neurons to transmit electrical and chemical signals to other cells.

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White blood cells are cells that exist inside the immune system to protect the human body from infection. These cells circulate through your blood system and tissues in case it has to respond to an injury or illness.  White blood cells will produce antibodies in order to fight off anything it doesn't recognize as being apart of the body. All of these white blood cells also contain a Nuclei which distinguish them from other blood cells. These cells get produced directly from your bone marrow and when theres more than usual it indicated that your body could be fighting off infection or a disease. Less common but still possible, the high white blood cell count can indicate blood cancer or bone marrow disorders.

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Bone Cells make up the bone tissue, which is made up of many different types including compact bone (hardened through the mineralization of tough proteins & fibres such as collagen), spongy bone (porous & light, found inside of the bone), bone marrow (produces blood cells, found inside the pores of spongy bone tissue), and periosteum (rigid & fibrous, protects the outskirts of the bone). The relationship between all of these tissues is what creates the basic structure of the bone: The Bone Matrix.

There are three types of specialized cells in human/animal bones. Together, they promote bone growth & mineral homeostasis. Osteoblasts build up the bone through the mineralization of collagen. Osteocytes regulate mineral homeostasis and add, sequester & redirect minerals in the blood stream as needed. Osteoclasts preform the opposite of Osteoblasts, breaking down old bone tissue by dissolving minerals into the bone matrix & releasing it back into the blood stream.

The Bone Cell serves three main purposes: to protect the internal organs, to create a frame for muscular movement & storage for minerals such as calcium and phosphorus.

https://biologydictionary.net/bone-cells/
https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_Introductory_Biology_(CK-12)/13%3A_Human_Biology/13.11%3A_Structure_of_Bones

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Function: specialized for the storage of energy in the form of triglycerides.
Features: under a microscope, looks like bulbous little spheres, each has a cell membrane and nucleus.

Its structure is specialized for fat storage as they contain large lipid droplets that function as the main energy reserve.

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Fat cells store energy in the form of triglycerides, and they also have a role in sensing and responding to changes in systematic energy balance. Fat cells can be found in both plant and animal cells. They contain a nucleus, mitochondria, a cell membrane, a golgi apparatus, cytoplasm and a far reservoir.

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The egg cell does one job, its connects with male sperm to become fertilized and make a baby. They are found in ovaries. They have a nucleus, cytoplasm, zona pellucida, and corona radiata.

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Nerve cells transmit different electrical signals in the Nervous System. They send information to the brain and can interpret a variety of stimuli. These cells are thin and can link together to be over 1 metre long, and are found in your spinal cord. Each nerve cell consists of a cell body, an axon (major branching fibre), and numerous smaller fibres. Nerve cells transport both electrical and chemical signals through their fibres into other nerve cells. These chemicals are transported inside vesicles into other nerve cells up your spinal cord to your brain.

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Type:
-A kind of plant cell
-The out side of plant roots are coverd with root hair cell.
Functions:
-Hold plants in space as they grow.
-Absorb water and minerals from the soil.
Features:
-There is a root hair that grow from the root hair cell.
This feature massively increases the surface area for the root hair cell to absorb more water and minerals. Most of the water are absorbed by the root hair cell.

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Nerve cells are excitable cells which can transduce a variety of stimuli into electrical signals, continuously sending information about the external and internal environment to the central nervous system. They're found in animals and are impossible to live without.

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Egg cells are the female sex cells - also known as gametes. They are found in the ovaries. It's job is to connect with the male sperm cell in order to become fertilised and produce offspring. The cell contains a nucleus, cytoplasm, zona pellucida, and corona radiata. These features help with the fertilization process since the sperm adheres to the ovum at the zona pellucida during fertilization.