S

  • Sagittal plane
  • Sarcalemma
  • Seashell
  • Secondary succession
  • Selective permeability
  • Seratia mercescens
  • Sex chromosome
  • Sexual intercourse
  • Signal transduction
  • Simple columnar epithelium
  • Skeletal muscle
  • Skin
  • Smooth muscle
  • Solvent
  • Speciation
  • Spindle fibers
  • Spongy bone
  • Sporophyte
  • Start codon
  • Stop codon
  • Substitution mutation
  • Sulphuric acid
  • Swollen glands
  • Symputric speciation
  • Synovial joint
  • Salivary glands
  • Sarcomere
  • Sebaceous glands
  • Secretion
  • Semi permeable membrane
  • Serous membrane
  • Sex linked genes
  • Sexual reproduction
  • Silent mutation
  • Simple diffusion
  • Skeletal system
  • Small intestine
  • Solute
  • Somatic cell
  • Species
  • Spirochete
  • Spontaneous generation
  • Stabiling selection
  • Stoma
  • Stroma
  • Substrate
  • Supine position
  • Symboiosis
  • Synapomorphy
  • Systole
  • Saprophyte
  • Scientific method
  • Secondary consumer
  • Selective breeding
  • Sepal
  • Sessile
  • Sexual dimorphism
  • Shrub
  • Simple cobiodal epithelium
  • Sister chromatids
  • Skeleton
  • Smooth endoplasmic reticulum
  • Solution
  • Somatic nervous system
  • Spinal card
  • Spleen
  • Sporangium
  • Stamen
  • Stomach
  • Submandibular gland
  • Sucrose
  • Suprachiasmatic nucles
  • Sympathetic nervous system
  • Synapsis