The human heart is a vital organ that pumps blood through the circulatory system. It consists of four chambers—two atria and two ventricles. Its rhythmic contractions maintain blood circulation and oxygenate tissues.
Tiwari Academy Discussion Latest Questions
The human brain is a complex organ responsible for cognition, emotions, and control of bodily functions. It consists of billions of neurons interconnected through synapses, forming the basis of consciousness and intelligence.
Contraceptive methods prevent pregnancy by inhibiting conception. Options include hormonal methods like pills, barrier methods like condoms, intrauterine devices, and permanent methods like sterilization. Choosing the right method depends on individual preferences and health considerations.
Red light has longer wavelengths, making it visible in the spectrum. Starlight, comprising various colors, appears white. Due to atmospheric scattering, stars may appear redder when low on the horizon. These lights offer insights into celestial objects and atmospheric phenomena.
Reflex actions are involuntary, rapid responses to stimuli, bypassing conscious control. They occur to protect the body and ensure survival, involving the spinal cord and peripheral nerves.