
Glucose, a monosaccharide

Cellulose, a polysaccharide

Alanine, an aminoacid

Hemoglobin, a protein

RuBisCO, a protein

Protein structural levels

Arachidic acid, a fatty acid.

DNA structure (I)

DNA structure (II)

DNA structure (III)

DNA structure (IV)

Robert Hooke's drawing of a cork

Root hair cell

Human liver cells

Structure of a prokaryiotic cell

Structure of an eucaryotic animal cell (I)

Structure of an eucaryotic animal cell (II)

Structure of an eucaryotic plant cell

Animal cell (blank) (I)

Anlam cell (blank) (II)

Neurone (blank)

Plant cell (blank)

Structure of the cell membrane

Structure of a mitochondrion (I)

Structure of a mitochondrion (II)

Mitochondria under the electron microscope

Structure of a chloroplast

Chloroplasts (I)

Chloroplasts (II)

Structure of the Golgi apparatus

Golgi apparatus under the electron microscope

Vesicle transport system (I)

Vesicle transport system (II)

The nucleus and the rER

DNA packaging in a cell

Human chromosomes in metaphase

Tissues of a plant's leaf

Main human tissues

Human connective tissues

Epithelial tissues in hominids

Compact bone

Levels of organisation in the humang being

Human body regions

Human body planes

Digestive system organs (I)

Digestive system organs (II)

Gastric epithelium

Duodenum wall

Intestinal villi

Vermiform appendix of the large intestine

Human breathing movements

The ribcage

Human respiratory system (I)

Human respiratory system (II)

Human lungs in detail

Bronchiolar epithelium (I)

Bronchiolar epithelium (II)

Alveoli and capillaries

Gas exchange through alveoli

Red blood cells (I)

Red blood cells (II)

Red blood cells (III) Sickle-cell anaemia

Squeezed red blood cells in ruptured capillary

Platelets

Air-hardened albumin crystals from blood clot

Chambers of the heart

Chambers, valves, arteries and veins of the heart (I)

Chambers, valves, arteries and veins of the heart (II)

Blood vessels

Blood pulmonary and systemic circuits

Arteries of the human body

Veins of the human body

Arteries and veins of the human body

The kidneys from behind

The urinary system

Anatomy of a kidney

Anatomy and location of a nephron

Structure of the renal corpuscle of a nephron

The function of the nephron

How soft drinks affect your health

Neurone

Neurones with glial cell (astrocyte) under the electron microscope

Drawing by Ramón y Cajal of neurones (1899)

Different types of neurones

Motor neurone

Sensory neurone

Bundles of axons

Neurone and synapse

Structure of a synapse

The synapse under the electron microscope

Structure of a nerve

Myelin sheath of a neurone

Structure of the Nervous System (I)

Structure of the Nervous System (II)

Concepts map on the Central Nervous System

Whole brain

Brain cross sections

Sagittal section of the brain

Parts of the brain in sagittal section (I)

Parts of the brain in sagittal section (II)

Cerebral cortical lobes and functions

Section of the spinal cord

Structure and functions of the Autonomic Nervous System

Structure of the eye (I)

Structure of the eye (II)

Sensory cells of the retina: cones (yellow) and rods (white)

Cross section of the iris

Myopia and hyperopia

Structure of the ear (I)

Structure of the ear (II)

Structure of the ear (III)

Taste buds

Olfactory cells of the nasal cavity's mucosa

Endocrine organs in humans (I)

Endocrine organs in humans (II)

The hypothalamus and the pituitary gland

Positive feedback in the endocrine system

Negative feedback in the endocrine system

Hormones involved in hunger

Anterior muscles of the human body

Posterior muscles of the human body

Muscle attached to bone by a tendon

Tendons and ligaments

The human skeleton (front)

The human skeleton (back)

The human skull (front)

The human skull (side)

Male reproductive system (I)

Male reproductive system (II)

Male reproductive system (III)

Male reproductive system (IV)

Male reproductive system (V)

Male reproductive system (VI)

Vasectomy

Female reproductive system (I)

Female reproductive system (II)

Female reproductive system (III)

Female reproductive system (IV)

Female reproductive system (V)

Development of the endometrium

Development of a follicle (I)

Development of a follicle (II)

Development of a follicle and of the endometrium

Hormonal control of the menstrual cycle

Estradiol crystals

Egg and sperms (I)

Egg and sperms (II)

Egg and sperms (III)

Sperm (I)

Sperm (II)

Sperm production in the seminiferous tubules

Ovulation

Fertilization

Ovulation, fertilization and implantation (I)

Ovulation, fertilization and implantation (II)

Ovulation, fertilization and implantation (III)

First stages of the embryonic development

Embryonic development up until implantation

Embryonic development in the first 60 days

Morula

5 weeks embryo

9 months fetus

Development of the face of a human fetus

Good news

Pyrite structure

Diamond structure

Graphite structure

Pyrite growth habit

Main crystal growth habits

Native gold

Native silver

Native copper

Rough diamond

Graphite

Sulphur

Cubic pyrite

Pyrite dodecahedral aggregate

Chalcopyrite and prismatic quartz

Cinnabar

Sphalerite

Galena

Magnetite octahedral aggregate

Hematite

Limonite

Corundum (rough ruby)

Halite

Fluorite

Calcite

Aragonite acicular aggregate

Aragonite twinning

Dolomite

Siderite

Magnesite

Azurite and acicular malachite

Malachite

Barite

Celestine

Anhydrite

Fibrous gypsum

Desert rose gypsum

Rock crystal quartz

Smoky quartz

Milk quartz

Citrine quartz

Rose quartz

Amethyst quartz

Agate (banded variety of chalcedony)

Orthoclase

Biotite

Muscovite aggregate

Olivine

Beryl

Tourmaline

Garnet

Talc

Chlorite

Serpentine

Staurolite cross twinning

Amber with insect

Obsidiane

Conglomerate

Breccia

Sandstone

Siltstone

Mudstone

Weathered limestone

Chalk

Fossiliferous limestone

Flysch of Zumaia (I)

Flysch of Zumaia (II)

Peat

Lignite

Bituminous coal

Anthracite

Peridotite

Gabbro

Diorite

Gray granite

Red granite

Syenite

Pegmatite

Porphyry

Andesite

Basalt

Basaltic volcanic bomb

Pumice

Obsidiane

Ropy lava

Pillow lava

Cataclasite

Marble

Quartzite

Hornfels

Slate

Phyllite

Micaceous schist

Garnetiferous mica schist

Banded gneiss

Augen gneiss

Migmatite

The rock cycle