Relationship between humans & animals & their physical functions

Overview & Fundamental Concept

Complete preparation guide for Relationship between humans & animals & their physical functions under AISSEE Class VI General Knowledge (Syllabus Item 20). Master high-yield facts, exam matrices, solved models, and 10 interactive drill MCQs with detailed explanations.

• Snake Diversity in India: While India is home to over 300 snake species, exactly FOUR SPECIES ARE POISONOUS (VENOMOUS) and hazardous to human life (NCERT Class 5 EVS Chapter 2 'A Snake Charmer's Story'): 1. Cobra (Naag): Iconic hooded snake; secretes potent neurotoxic venom that paralyzes the nervous system, shutting down respiratory muscle contraction. 2. Common Krait (Kareit): Steel-blue/black body with thin paired white crossbars; highly lethal neurotoxin; nocturnal hunter that bites sleeping victims with minimal initial pain. 3. Russell's Viper (Duboya): Heavy-bodied viper marked with 3 longitudinal series of reddish-brown dark-ringed spots; when alarmed, emits a terrifying, loud hissing roar resembling a whistling pressure cooker; injects severe hemotoxic venom that dissolves vascular endothelium and lyses red blood cells. 4. Saw-scaled Viper (Afai): Smallest of the venomous four (rarely exceeds 60 cm); keeled serrated flank scales that rub together in a continuous figure-8 pattern to produce a raspy sizzling warning sound; hemotoxic venom.
• Snake Dental Anatomy & Fangs: Venomous snakes possess TWO HOLLOW TEETH called FANGS (maxillary teeth modified like hypodermic needles); when the snake strikes, specialized venom glands behind the eyes contract, pumping venom through the fangs directly into the victim's tissue/bloodstream.
• Swallowing Whole: Snakes do NOT chew, masticate, or tear their prey; their lower jawbones are connected to the skull by flexible elastic ligaments that dislocate widely, allowing snakes to swallow prey significantly larger than their own head whole!
• Auditory Physiology (No External Ears): Snakes have NO external ears, ear pinnae, or eardrums whatsoever; they cannot hear acoustic airborne musical sounds played by a snake charmer's flute (Been); snakes react purely to the visual motion of the pipe and perceive footsteps and threats by sensing substrate VIBRATIONS transmitted through the ground into their ventral belly scales and jaw quadrate bones.
• The Anti-Venom Antidote: The universal medical life-saving injection (Antivenin) administered in government hospitals to snakebite patients is produced directly FROM THE VENOM OF SNAKES THEMSELVES; small non-lethal doses of venom are injected into horses/sheep, and the neutralizing antibodies formed in their blood serum are harvested, purified, and bottled.
• Snakes as 'Farmer's Friends': Agricultural ecology relies heavily on non-venomous and venomous snakes; they hunt and devour millions of destructive field rats and mice that would otherwise ravage standing cereal crops in fields and granaries.

• The Kalbeliya Community (NCERT Class 5 EVS Chapter 2): A traditional nomadic pastoral community residing predominantly in the desert districts of Rajasthan; popularly known as 'Saperas' (snake charmers).
• Nomadic Heritage: Traveled from village to village carrying live snakes in round woven bamboo baskets (Pitara) balanced across their shoulders on a bamboo pole (Kawar); welcomed warmly by villagers because they brought entertainment, eliminated rodents, and provided traditional forest herbal remedies.
• Traditional Musical Ensemble (The Been Party): • Been (Pungi): Traditional wind instrument constructed from a dried, hollowed bottle gourd (Lauki / Tumba) fitted with two reed pipes. • Tumba, Dhafli, and Khanjari: Percussion and rhythm instruments, all traditionally handcrafted from dried gourds and animal parchment without using metal screws.
• Inherited Ecological Wisdom: Kalbeliya elders train children from early youth to catch non-venomous and venomous snakes safely without harming them; by examining the pattern and spacing of puncture marks on a snakebite victim's skin, a skilled Kalbeliya elder can instantly identify the exact species of snake responsible and prescribe wild herbal pastes.
• Social Traditions: Snakes are revered as sacred living assets, not commodities; Kalbeliyas do not kill snakes; at traditional weddings, snakes are proudly gifted to the daughter as a cherished family heirloom.
• Kalbeliya Dance (UNESCO World Heritage): The women of the Kalbeliya community perform the globally celebrated Kalbeliya folk dance; dressed in billowing black skirts embroidered with red ribbons and silver mirrors, their fluid, acrobatic body movements replicate the sinuous gliding and hood-rearing of a black cobra; inscribed on the UNESCO Representative List of the Intangible Cultural Heritage of Humanity.
• The Wildlife Protection Act (1972) Impact: Enacted to safeguard diminishing wildlife; strictly banned the catching, keeping, domesticating, or commercial performing of wild snakes; compelled younger Kalbeliyas to transition toward musical stage performances, tourism, and vocational livelihoods.

• Poaching Definition: The illegal hunting, capturing, or killing of wild animals in violation of regional, national, and international wildlife conservation laws.
• Elephant (Asian & African Elephants): Illegally slaughtered by poachers for their Ivory Tusks (elongated incisor teeth); ivory is carved into luxury ornaments, jewelry, and statues, decimating elephant breeding populations.
• One-Horned Rhinoceros (Great Indian Rhino): Ruthlessly poached in Assam and West Bengal for its single Nasal Horn; the rhino horn is NOT bone or ivory — it is composed of solid, compressed Keratin (the exact same structural protein found in human hair and fingernails!); targeted due to superstitious myths regarding traditional medicine in East Asia.
• Tiger & Leopard (Big Cats): Poached for their luxurious striped/spotted pelts (skins) for high-end home rugs, as well as their bones, teeth, and claws for superstitious traditional remedies.
• Musk Deer (Kasturi Mrig): Solitary mountain deer inhabiting high Himalayan alpine scrub forests; poached to extract the Musk Pod (Kasturi), an aromatic glandular sac found near the male deer's abdomen/navel; prized globally for producing luxury perfumes and traditional Ayurvedic/Tibetan medicine.
• Crocodiles, Alligators & Snakes: Slain for their exotic reptilian Leather hides to manufacture high-end fashion handbags, boots, and belts.
• Wildlife Protection Act, 1972: Enacted by the Parliament of India; provides 6 statutory schedules granting graded legal protection; Schedule I accords highest protection with strictest non-bailable criminal penalties for hunting or trading tigers, elephants, rhinos, lions, and Great Indian Bustards.

• National Park (NP) Definition: A protected natural sanctuary strictly reserved for the preservation of wildlife and biodiversity; human activities such as livestock grazing, commercial forestry, timber collection, and private land tenure are COMPLETELY PROHIBITED under the Wildlife Protection Act 1972.
• Jim Corbett National Park (Uttarakhand): India's very FIRST national park, originally established in 1936 as Hailey National Park (later renamed Ramganga, and finally Corbett in honor of conservationist Jim Corbett); situated in the Nainital and Pauri Garhwal districts; the historic birthplace of 'Project Tiger' launched on April 1, 1973.
• Kaziranga National Park (Assam): Located on the floodplains of the mighty Brahmaputra river; harbors more than two-thirds of the world's entire surviving population of the Great One-Horned Rhinoceros (over 2,600 rhinos); inscribed as a UNESCO World Heritage Site.
• Gir National Park (Gujarat): The world's ONLY wild sanctuary and refuge for the endangered Asiatic Lion (Panthera leo persica); located in the Junagadh district of the Kathiawar peninsula.
• Keoladeo Ghana National Park (Bharatpur, Rajasthan): Formerly known as the Bharatpur Bird Sanctuary; a man-made wetland UNESCO World Heritage Site that hosts thousands of endangered migratory waterbirds during winter, famously including the Siberian Crane.
• Sundarbans National Park (West Bengal): The world's largest halophytic tidal mangrove delta forest, formed by the confluence of the Ganga, Brahmaputra, and Meghna rivers; home to the swimming Royal Bengal Tiger and estuarine saltwater crocodiles; UNESCO World Heritage Site.
• Kanha & Bandhavgarh National Parks (Madhya Pradesh): Central Indian tiger sanctuaries; Kanha is celebrated for saving the hardground Swamp Deer (Barasingha / 'Bhoorsingh the Barasingha') from total extinction; Bandhavgarh boasts the highest tiger density in India.
• Periyar National Park (Kerala): Located in the cardamom hills of the Western Ghats around Periyar Lake; famous for wild Asian Elephant herds and Indian gaur.
• Hemis National Park (Ladakh): Spanning 4,400 sq km, Hemis is the LARGEST national park in India and the highest national park; world-renowned as the global capital for Snow Leopard (Shan) conservation.