Earthworm Flashcards
What is the scientific name of the common earthworm?
Pheretima posthuma
Which system is responsible for the digestion of food in earthworms?
Digestive system
True or False: Earthworms have a complete digestive system.
True
Fill in the blank: The earthworm’s digestive tract starts from the __________.
mouth
What structure in the earthworm stores food temporarily?
Crop
What is the function of the gizzard in an earthworm?
To grind food
Which part of the digestive system absorbs nutrients in earthworms?
Intestine
True or False: Earthworms have teeth.
False
What is the primary function of the nervous system in earthworms?
To coordinate body functions and responses
Which structure acts as the brain in earthworms?
Cerebral ganglia( supra pharyngeal)
Fill in the blank: Earthworms possess a __________ nervous system.
ventral
What is the role of the ventral nerve cord in earthworms?
To transmit nerve impulses along the body
True or False: Earthworms have sensory organs for light detection.
True
What type of reproduction do earthworms primarily use?
Sexual reproduction
Fill in the blank: Earthworms are __________, meaning they have both male and female reproductive organs.
hermaphrodites
What is the name of the reproductive structure that produces a cocoon in earthworms?
Clitellum
What is the primary excretory organ in earthworms?
Nephridia
True or False: Earthworms excrete waste through their skin.
True
What is the function of nephridia in earthworms?
To filter and excrete waste
Fill in the blank: The earthworm’s skin is important for __________.
gas exchange
What is the main component of the earthworm’s body morphology?
Segmented body
How many segments does a typical earthworm have?
Over 100 segments
What is the purpose of the setae in earthworms?
To aid in locomotion
Fill in the blank: The earthworm’s body is divided into __________ regions.
anterior, posterior, and clitellar
True or False: Earthworms have a rigid skeleton.
False
What type of circulatory system do earthworms possess?
Closed circulatory system
What role do blood vessels play in the earthworm’s circulatory system?
They transport nutrients and oxygen
Fill in the blank: Earthworm blood contains __________ for transporting oxygen.
hemoglobin
What is the primary function of the earthworm’s dorsal blood vessel?
To pump blood forward
How do earthworms contribute to soil health?
By aerating and enriching the soil
True or False: Earthworms can regenerate lost segments.
True
What is the significance of the earthworm’s moist skin?
It facilitates gas exchange
Fill in the blank: The __________ is the outermost layer of an earthworm’s body.
cuticle
What type of muscle layers do earthworms have?
Circular and longitudinal muscles
True or False: Earthworms have a well-developed respiratory system.
False
What is the role of the earthworm’s pharynx?
To help ingest food
Fill in the blank: The __________ helps to propel food through the digestive tract.
muscular contractions
What is the primary function of the earthworm’s anus?
To expel waste
True or False: Earthworms can survive in both aerobic and anaerobic conditions.
False
What is the term for the earthworm’s ability to sense its environment?
Sensory perception
Fill in the blank: Earthworms have __________ that detect vibrations and chemicals.
sensory cells
What is the role of the earthworm’s seminal receptacles?
To store sperm received from another earthworm
True or False: Earthworms can reproduce asexually.
False
What is the significance of the earthworm’s coelom?
It acts as a hydrostatic skeleton and a space for organ development
Fill in the blank: Earthworms undergo __________ during reproduction.
cross-fertilization
What is the process by which earthworms move through the soil?
Peristalsis
True or False: The earthworm’s body is covered by a tough exoskeleton.
False
What is the function of the earthworm’s chloragogen tissue?
To store glycogen and produce urea
Fill in the blank: The __________ is the segment of the earthworm where the clitellum is located.
reproductive segment
