sccien asesmint 2 Flashcards
yuhh (25 cards)
What is the difference between unicellular and multicellular organisms?
Unicellular organisms consist of a single cell, while multicellular organisms have multiple cells.
Why do multicellular organisms need organ systems?
Organ systems allow specialized functions, helping the organism survive by providing nutrients, gases, and waste removal
What are the basic units of living things?
Cells – they have specialized structures and functions.
List the levels of organization in living things
Cells → Tissues → Organs → Organ Systems → Organism
What is a system in biology?
A system is a group of organs working together for a specific function.
What is the main function of the skeleton?
Provides support, protection, and movement for the body.
What do ligaments and tendons do?
Ligaments connect bones, tendons connect muscles to bones.
What are the 7 different types of joints
ball and socket, hinge, pivot, saddle, plane joint, Condyloid joint and immovable
bash and cipps (Ball And Socket Hinge and Condyloid Immovable Pivot Plane Saddle)
where can you find the ball and socket joint
shoulder,hip
where can you find the Condyloid joint
wrist, knucle
where can you find the pivot joint
neck, forearm
where can you find the hinge joint
elbow, knee
where can you find the sadde joint
thumb
where can you find the gliding joint
wrist, ankle
where can you find immovable/fixed joints
skull, teeth and jaw
what are the bones on the skull connected with
sultures
What makes gas exchange efficient in your lungs?
Thin walls, large surface area, and constant blood flow.
Why does the body remove carbon dioxide?
CO₂ is a waste product that must be eliminated to maintain blood pH balance.
What is the role of the excretory system?
Removes waste products from the blood, primarily through the kidneys.
How do the kidneys help?
Filter blood and produce urine to remove toxins
What is the difference between chemical and physical digestion?
Physical digestion involves breaking food into smaller pieces (e.g., chewing), while chemical digestion uses enzymes and acids to break down food at a molecular level.
What is the pathway of food through the digestive system?
Mouth → Esophagus → Stomach → Small Intestine → Large Intestine → Rectum → Anus (where you can get anal cancer 🤩)
What does a larger surface ensure? (in lungs/ small intestine)
MORE NUTRIENT ABSORPTION
How do cells in multicellular organisms communicate and work together?
Cells send chemical signals to coordinate activities and form tissues, organs, and organ systems, ensuring the body functions properly.
