Unit 4 - 4C

A tooth is a hard, calcified structure found in the human mouth that plays a crucial role in biting, chewing, and speaking. It is composed of different layers, including enamel, dentin, and pulp. The enamel forms the outermost protective layer, while the dentin provides support and structure. Within the tooth's core lies the pulp, which contains nerves, blood vessels, and connective tissue. Teeth come in various types, including incisors, canines, premolars, and molars, each serving a specific function in the process of breaking down food. Maintaining oral hygiene and regular dental care are essential for preserving the health and integrity of teeth.

An email is a digital message sent over the Internet from one person or organization to another. It can include text, attachments like images or documents, and links to websites. Emails are sent through email systems, which use addresses to identify the sender and recipient. The message is delivered to the recipient’s inbox, where it can be read and responded to. Emails are commonly used for personal, business, and official communication because they are fast, convenient, and can be accessed from various devices like computers and smartphones.

A shower is a plumbing fixture used for washing the body with a spray of water. It typically consists of a showerhead, a faucet or controls for adjusting water temperature and pressure, and a drain to remove used water. Showers are often built into bathrooms, with walls or curtains to contain the water. The water flows from the showerhead, either directly from a pipe or from a water heater, and is directed onto the person standing underneath. Showers are a common and convenient way to clean oneself, providing a quick and efficient alternative to baths.

Breakfast refers to the first meal of the day, typically consumed in the morning after waking up from sleep. It is often considered the most important meal as it provides the body with essential nutrients and energy to start the day. Traditional breakfast foods vary widely across cultures but commonly include items like cereal, eggs, toast, fruit, and beverages such as coffee or tea.