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Cells are the basic building blocks of the body. All tissues and organs are made of billions of different cells. Human cells vary in size, but all are quite small. Even the largest, a fertilized egg, is too small to be seen with the naked eye. All cells in a person's body are descendants of two cells, the mother's egg and the father's sperm.
- Mind-Body Interactions
Mind-body medicine refers to therapeutic techniques based on...
- Introduction to The Human Body
The biology of the human body includes. Physiology (how the...
- Anatomy and Disease
The human body is remarkably well designed. Most of its...
- Tissues and Organs
Organs are the body's recognizable structures (for example,...
- Organ Systems
Organ systems often work together to do complicated tasks....
- Barriers on The Outside and The Inside
Body surfaces not only separate the outside from the inside...
- Genes and Chromosomes
Except for certain cells (for example, sperm and egg cells...
- Mind-Body Interactions
Dec 13, 2021 · Figure 10.3.4 10.3. 4: There are 4 different types of tissues in our body. Nervous tissue is found in the brain, spinal cord, and nerves. Muscular tissue such as cardiac, smooth, and skeletal muscle. Epithelial tissue lines the GI tract organs and other hollow organs and is found on the skin surface (epidermis).
- Stem cells. Before a cell becomes specialised, it first starts out as a stem cell. The unique feature of stem cells is that they are pluripotent - they have the potential to become any type of cell in the body.
- Red blood cells. Erythrocyte. Erythrocytus. 1/2. Synonyms: Red blood cell, Erythrocyti. Red blood cells are known as erythrocytes, and are the most common type of blood cell.
- White blood cells. White blood cells, also known as leukocytes, are a vital component of the immune system. There are five different types, which fall under two main categories; granulocytes and agranulocytes.
- Platelets. Just like the white and red blood cells, platelets also form an important component of the blood. Technically platelets are fragments of cells rather than true cells, but are vital in the control of bleeding.
- What Is A Semipermeable membrane?
- What Are Solutes and solvents?
- What Is concentration?
Before we jump into osmosis, we need to understand some important things about cells. The cells in our bodies are surrounded by a wall-like structure called a cell membrane. This membrane is special because only water and very small molecules can pass through it. We use the word semipermeable to describe the ability to only let certain things pass ...
Osmosis is when water molecules travel from a place with low solute concentration to a place with high solute concentration. To understand this better, we need to talk about solutes and solvents. A solute is a chemical that can dissolve in a solvent. Chemicals that can do this are called soluble. When you dissolve one or more solutes into a solvent...
You may have heard some products described as concentrated - like laundry detergent or orange juice. Concentrated refers to the amount of solute compared to the amount of solvent in a solution. When there is a lot of solute compared to solvent, a solution is said to be concentrated. When there is a small amount of solute compared to solvent, then a...
Oct 30, 2023 · Organelles are small structures within the cytoplasm that carry out functions necessary to maintain homeostasis in the cell. They are involved in many processes, for example energy production, building proteins and secretions, destroying toxins, and responding to external signals. Organelles are considered either membranous or non-membranous.
- Julie Doll
- 24 min
- Content Manager
Course: Middle school biology > Unit 1. Lesson 2: Cell parts and functions. Cell parts and their functions. Comparing animal and plant cells. Cell parts and functions. Understand: cell parts and functions. Apply: cell parts and functions.
Nov 3, 2023 · Epithelial tissue is one of the four tissue types. It is found lining the inner and outer body surfaces and comprising the parenchyma of the glands. It is divided into surface (covering) and glandular (secreting) epithelium. Surface epithelium consists of one or more cell layers, stacked over a thin basement membrane.
