The respiratory system is responsible for the exchange of gases, primarily oxygen and carbon dioxide, between the body and the external environment. It consists of the upper respiratory tract and the lower respiratory tract. The upper respiratory tract includes the nose, nasal cavity, pharynx, and larynx, while the lower respiratory tract comprises the trachea, bronchi, … Read more
Disorders of the gastrointestinal tract (GIT) encompass a wide range of conditions that affect the structure and function of the digestive system. These disorders can involve any part of the gastrointestinal tract, including the esophagus, stomach, small intestine, large intestine (colon), rectum, and anus, as well as associated organs such as the liver, pancreas, and … Read more
Digestion: Digestion is the process by which food is broken down into smaller molecules that can be absorbed and utilized by the body. It occurs in several stages, primarily within the gastrointestinal tract, involving mechanical and chemical processes. 1. Mechanical Digestion: Mechanical digestion involves the physical breakdown of food into smaller particles, increasing its surface … Read more
The liver is the largest internal organ in the human body, located in the upper right quadrant of the abdomen. It performs a wide range of vital functions essential for metabolism, digestion, detoxification, and immune defense. Anatomy of the Liver: 1. Location: The liver is situated beneath the diaphragm, primarily on the right side of … Read more
The pancreas is a vital organ located in the abdominal cavity with both endocrine and exocrine functions. It plays a crucial role in digestion and glucose metabolism by producing digestive enzymes and hormones, including insulin and glucagon. Anatomy of the Pancreas: 1. Location: The pancreas is located behind the stomach, extending horizontally across the upper … Read more
Salivary glands are a group of exocrine glands located in and around the oral cavity that produce saliva. Saliva is a watery fluid containing enzymes, electrolytes, mucins, and antibacterial compounds. It plays a crucial role in lubricating the oral cavity, initiating digestion, and protecting the teeth and oral mucosa. Anatomy of Salivary Glands: 1. Major … Read more
Small Intestine Definition: The small intestine is a vital part of the digestive system in humans and many other animals. It is a long, coiled tube that is situated between the stomach and the large intestine. Despite its name, the small intestine is actually longer than the large intestine, although it has a smaller diameter. … Read more
The digestive system is a complex network of organs responsible for the ingestion, digestion, absorption, and elimination of food and nutrients. The gastrointestinal (GI) tract, also known as the digestive tract or alimentary canal, is a continuous tube that extends from the mouth to the anus and is composed of several specialized organs, including the … Read more
Autonomic Nervous System The Autonomic Nervous System (ANS) is a special part of the nervous system that controls the involuntary activities of the body. Involuntary means that these functions happen automatically, without our conscious effort. Examples include heartbeat, digestion, breathing, sweating, urination, and pupil size changes. The ANS plays an essential role in maintaining a … Read more
The gonads are specialized reproductive organs that serve as the cornerstone of the human reproductive system. They play a pivotal role in both the production of gametes—the reproductive cells necessary for sexual reproduction—and the secretion of sex hormones, which regulate sexual development, secondary sexual characteristics, and reproductive functions. In males, the gonads are known as … Read more
