Lecciones de 6to Grado

a vibrant underwater coral reef teeming with colorful fish and sea life

a river splitting into many branches as it meets the sea, forming a green fan-shaped delta, aerial

a cutaway of the ground rupturing along a fault line, seismic waves radiating through rock layers

a massive blue glacier carving a valley, with crevasses and a meltwater river at its snout

a golden African savanna with scattered acacia trees and grazing wildlife

a swirling spiral hurricane seen from space above a blue ocean and coastline

a chain of tropical volcanic islands ringed by coral reefs in a turquoise sea, aerial

a stylized world-journey scene: travelers with suitcases, a ship and a plane over open landscape

a montage landscape with a forest, an oil field, farmland, and a mine under one sky

a stylized globe of the oceans with flowing warm and cold current ribbons, no text

a rugged peninsula of land reaching into the sea with cliffs and a lighthouse

a cutaway of Earth's crust showing plate boundaries, a spreading ridge and a subduction trench with magma

flat-topped rock plateaus and mesas rising above an arid landscape at sunset

a lush multi-layer rainforest interior with canopy, vines, mist, and colorful birds

a cutaway hillside showing soil layers being worn away by rain and wind into a gully

a cross-section of the sky showing cloud layers, a storm cell, and clear air above

a vast dark evergreen boreal forest with a still lake and distant snowy peaks

a stark treeless Arctic tundra with mosses, a caribou, and low sun

a landscape water cycle: sea evaporating, clouds over mountains, rain, and rivers returning to sea

a towering ocean wave approaching a coastline, cutaway showing the wave building from the seabed

a dramatic erupting volcano with glowing lava, ash plume, and a cutaway of the magma chamber

a powerful multi-tier waterfall plunging into a misty gorge surrounded by lush green

a lush green wetland with reeds, still water, wading birds, and mist

A detailed diagram of the liver with blood vessels showing toxins entering and cleaned blood leaving, alongside illustrations of enzymes breaking down alcohol and drugs.

An illustrated anatomy lab with students respectfully examining models and a poster showing ethical guidelines such as consent, respect, and confidentiality, guided by the character Medi.

A step-by-step infographic showing food moving from mouth to intestines, highlighting enzyme activity and nutrient absorption into blood vessels.

An animated diagram of the heart showing the atria and ventricles with arrows illustrating blood flow during contraction and relaxation phases.

A detailed illustration showing a person having their blood pressure taken with a cuff on the arm and a pulse being checked at the wrist.

A cross-section of skin showing sweat glands, blood vessels, and hair follicles with animated steam representing sweat evaporation and arrows showing blood flow changes.

A split-panel close-up showing intact skin surface, mucus-lined nasal passage, and rapidly waving cilia in the bronchial tract, with Medi in a lab coat standing in the center holding a glowing shield labeled First Line of Defense.

An illustrated animation showing the pituitary gland releasing growth hormone into the bloodstream, with growing bones and muscles highlighted in a human figure.

A colorful cross-section of the human body showing skeletal muscles attached to bones, the heart with cardiac muscle highlighted, and smooth muscles lining internal organs like the stomach and intestines.

An illustrated diagram showing the peripheral nervous system with nerves branching out from the spinal cord to limbs and organs, alongside a highlighted reflex arc pathway demonstrating a knee-jerk reflex.

A detailed cross-section of lungs showing alveoli with oxygen entering the blood and carbon dioxide leaving, plus a zoomed-in view of capillaries exchanging gases with body cells.

A vivid 3D model of the DNA double helix showing the sugar-phosphate backbone and paired nitrogenous bases (adenine-thymine, cytosine-guanine) with labels and arrows illustrating base pairing.

A vibrant 3D cross-section of a human cell with the glowing nucleus at center, mitochondria scattered throughout jelly-like cytoplasm, and a detailed bilayer cell membrane forming the boundary, while Medi points to the nucleus with a long pointer stick.

A colorful pyramid infographic where Medi points upward through four rising tiers labeled cells, tissues, organs, and organ systems, each tier illustrated with vivid human body examples connected by upward arrows showing increasing complexity.

A bright clinic with labeled lung models and rows of inhalers on shelves, where Medi points to a side-by-side diagram comparing the dramatically narrowed inflamed airways of asthma against mucus-choked bronchial tubes in acute bronchitis.

An anatomical illustration of the female reproductive system with clearly labeled arrows pointing to the ovaries, fallopian tubes, uterus, cervix, and vagina, while Medi stands beside the diagram holding a pointer and a phase chart of the menstrual cycle.

A microscopic field revealing biconcave red blood cells, irregularly shaped white blood cells, tiny disc-like platelets, and pale straw-colored plasma filling the background, with Medi holding a magnifying glass over the sample and labeled callout arrows identifying each component.

A grid of four microscopic panels showing epithelial tissue as a smooth continuous protective sheet, connective tissue with dense collagen fibers, a cross-section of striated contracting muscle fibers, and a branching neuron network for nervous tissue, with Medi at center explaining each panel.

A color-coded layered anatomical figure displaying each body system in a distinct hue — skeletal in white, muscular in red, circulatory in blue and red, respiratory in light blue, digestive in green, and nervous in yellow — with Medi holding a matching color-coded legend and pointer.

A detailed human skeleton diagram with labeled bones and glowing joint regions highlighted in gold, with rotating 3D bone models in the foreground and Medi pointing to the hip's ball-and-socket joint to demonstrate its wide range of motion.

A detailed cross-section of human skin revealing the thin stratum corneum at the surface, the epidermis packed with layered keratinocytes, the dermis housing coiled sweat glands, hair follicles, and capillary networks, and the fatty hypodermis cushioning at the base, with Medi pointing to each labeled layer using a magnifying lens.

A colorful cross-section of the human digestive system showing the mouth, stomach, pancreas, and intestines with labeled enzymes like amylase, protease, and lipase acting on different foods.

A bright classroom lined with human body posters and scale models, a labeled skeleton standing in the corner, a heart-pumping-blood diagram projected on the board, and Medi holding a long pointer ready to explain structure and function.

A transparent human body model glowing under bright lab lights with four color-coded regions: the skull highlighted blue for the cranial cavity, the ribcage region in pink for the thoracic cavity, the abdomen in yellow, and the lower pelvis in green, each showing floating organ icons in their correct positions.

A vibrant diagram showing the human body with major endocrine glands highlighted: pituitary, thyroid, adrenal glands, pancreas, and ovaries/testes, with arrows indicating hormone release and target organs.

A colorful cross-section illustration of a neuron showing the cell body, dendrites, axon, myelin sheath, and synapse with labeled parts, set against a backdrop of a nerve network.

A dynamic split-panel illustration with a sweating figure standing in bright summer heat on the left, a shivering figure in a snowy winter scene on the right, and a central clinical thermometer reading 37 degrees C, with labelled arrows pointing to sweat glands and dilated blood vessels on one side and constricted vessels on the other.

A bright hospital room with a bandaged forearm resting on a bed, and a four-panel wound-healing diagram on the wall showing a bleeding cut sealed by a clot, inflamed tissue crowded with white blood cells, fresh pink tissue filling the gap, and finally smooth healed skin with a faint scar.

A glowing anatomical cross-section of the human torso showing branching pale-green lymph vessels running from the limbs toward the chest, enlarged oval lymph nodes visible at the neck, armpits, and groin, the dark-red spleen nestled behind the stomach on the left, and a thymus shown in the upper chest.

An animated image showing the diaphragm’s movement downward during inhalation and upward during exhalation, with arrows indicating air flow in and out of the lungs, and muscles highlighted.

A detailed, colorful 3D cross-section image of the human lungs showing the trachea, bronchi, bronchioles, alveoli, and surrounding blood vessels with labels.