Tag: science & technology

Hemoglobin contains iron (Fe) in its heme groups, enabling it to bind and transport oxygen throughout the body. Each hemoglobin molecule has four iron atoms, allowing it to carry four oxygen molecules. Iron deficiency leads to anemia due to reduced oxygen-carrying capacity. Chlorine, calcium, and carbon are not structural components of hemoglobin.

The kidney's primary function is filtering blood and removing metabolic waste products like urea, creatinine, and excess salts through urine formation. While kidneys do help regulate blood pressure (via renin-angiotensin system), this is not their main function. Temperature regulation is managed by the skin and hypothalamus, and digestion involves the gastrointestinal tract.

Haemoglobin is a protein in red blood cells that binds to oxygen in the lungs and carries it to tissues throughout the body. Each haemoglobin molecule can carry up to four oxygen molecules.

Lachrymal glands, located above each eye, produce tears that lubricate and protect the eyes. Tears contain water, salts, and antibodies to keep eyes moist and clean.

The liver is the largest gland in the human body, weighing around 1.5 kg. It performs vital functions including detoxification, bile production, and nutrient metabolism.

The skin is the largest organ in the human body, covering approximately 2 square meters in adults. It provides protection, temperature regulation, and sensation.

People with blood group O (especially O negative) are called universal donors because their red blood cells lack A and B antigens, allowing transfusion to any blood type.

The pituitary gland is called the master gland because it produces hormones that regulate other endocrine glands. It controls growth, metabolism, and reproduction.

Newborns have approximately 300 bones, which fuse together during growth to form the 206 bones found in an adult human skeleton.