Why do you have to use blue and red ballpen or crayon in tracing the flow of blood?

Why do you think you used blue and red ink in tracing the flow of the blood?

They use red and blue ink when tracing the flow of blood because red ink is for arteries and blue ink is for veins. This can cause a problem because people sometimes think that arteries have red blood and veins have blue blood, but this is not true.

What are some colors that begin with the letter B?

Baby BlueBeigeBitternessBlackBlizzard BlueBlueBlue-GreenBlue-VioletBondi BlueBrassBrick RedBronzeBrownBuffBurgundyBurnt OrangeBurnt SiennaBurnt UmberButtercreamblue, brown, black, blaze orange, biege, bone, baby pink, baby blueBlue BlackBrownHere are some colors that start with the letter "B":blackbrownblueblue black browncolors beginning with B: * black * brown * blue * beige * beet red * berry * blaze orange * buff * baby blue * brick red· Baby Blue · Banana Mania (a Crayola Crayon color)· Beaver (a Crayola Crayon color)· Beige· Bittersweet (a Crayola Crayon color)· Black· Blizzard Blue (a former Crayola Crayon color retired in 2003)· Blue· Blue Bell (a Crayola Crayon color)· Blue Gray (a former Crayola Crayon color retired in 1990)· Blue Green (a Crayola Crayon color)· Blue Violet (a Crayola Crayon color)· Blush (a Crayola Crayon color)· Bronze· Brown· Burnt Orange (a Crayola Crayon color)· Burnt Sienna (a Crayola Crayon color)· Burnt Umber (a Crayola Crayon color)· ByzantiumBlue, blondBlueBrownBlueBeigeblue?· Baby Blue· Banana Mania (a Crayola Crayon color)· Beaver (a Crayola Crayon color)· Beige· Bittersweet (a Crayola Crayon color)· Black· Blizzard Blue(a former Crayola Crayon color retired in 2003)· Blue· Blue Bell (a Crayola Crayon color)· Blue Gray (a former Crayola Crayon color retired in 1990)· Blue Green (a Crayola Crayon color)· Blue Violet (a Crayola Crayon color)· Blush (a Crayola Crayon color)· Bronze· Brown· Burnt Orange (a Crayola Crayon color)· Burnt Sienna (a Crayola Crayon color)· Burnt Umber (a Crayola Crayon color)· Byzantiumblue* black * brown * blue * beige * burgundy * blush * bone· Baby Blue· Banana Mania (a Crayola Crayon color)· Beaver (a Crayola Crayon color)· Beige· Bittersweet (a Crayola Crayon color)· Black· Blizzard Blue (a former Crayola Crayon color retired in 2003)· Blue· Blue Bell (a Crayola Crayon color)· Blue Gray (a former Crayola Crayon color retired in 1990)· Blue Green (a Crayola Crayon color)· Blue Violet (a Crayola Crayon color)· Blush (a Crayola Crayon color)· Bronze· Brown· Burnt Orange (a Crayola Crayon color)· Burnt Sienna (a Crayola Crayon color)· Burnt Umber (a Crayola Crayon color)· ByzantiumBlue.BrownBlack· Baby Blue· Banana Mania (a Crayola Crayon color)· Beaver (a Crayola Crayon color)· Beige· Bittersweet (a Crayola Crayon color)· Black· Blizzard Blue(a former Crayola Crayon color retired in 2003)· Blue· Blue Bell (a Crayola Crayon color)· Blue Gray (a former Crayola Crayon color retired in 1990)· Blue Green (a Crayola Crayon color)· Blue Violet (a Crayola Crayon color)· Blush (a Crayola Crayon color)· Bronze· Brown· Burnt Orange (a Crayola Crayon color)· Burnt Sienna (a Crayola Crayon color)· Burnt Umber (a Crayola Crayon color)· Byzantiumblue. black. brown. blonde (hair colour). beige.Blue, black, burgundy, brown

Are some colors that begin with the letter B?

Baby BlueBeigeBitternessBlackBlizzard BlueBlueBlue-GreenBlue-VioletBondi BlueBrassBrick RedBronzeBrownBuffBurgundyBurnt OrangeBurnt SiennaBurnt UmberButtercreamblue, brown, black, blaze orange, biege, bone, baby pink, baby blueBlue BlackBrownHere are some colors that start with the letter "B":blackbrownblueblue black browncolors beginning with B: * black * brown * blue * beige * beet red * berry * blaze orange * buff * baby blue * brick red· Baby Blue · Banana Mania (a Crayola Crayon color)· Beaver (a Crayola Crayon color)· Beige· Bittersweet (a Crayola Crayon color)· Black· Blizzard Blue (a former Crayola Crayon color retired in 2003)· Blue· Blue Bell (a Crayola Crayon color)· Blue Gray (a former Crayola Crayon color retired in 1990)· Blue Green (a Crayola Crayon color)· Blue Violet (a Crayola Crayon color)· Blush (a Crayola Crayon color)· Bronze· Brown· Burnt Orange (a Crayola Crayon color)· Burnt Sienna (a Crayola Crayon color)· Burnt Umber (a Crayola Crayon color)· ByzantiumBlue, blondBlueBrownBlueBeigeblue?· Baby Blue· Banana Mania (a Crayola Crayon color)· Beaver (a Crayola Crayon color)· Beige· Bittersweet (a Crayola Crayon color)· Black· Blizzard Blue(a former Crayola Crayon color retired in 2003)· Blue· Blue Bell (a Crayola Crayon color)· Blue Gray (a former Crayola Crayon color retired in 1990)· Blue Green (a Crayola Crayon color)· Blue Violet (a Crayola Crayon color)· Blush (a Crayola Crayon color)· Bronze· Brown· Burnt Orange (a Crayola Crayon color)· Burnt Sienna (a Crayola Crayon color)· Burnt Umber (a Crayola Crayon color)· Byzantiumblue* black * brown * blue * beige * burgundy * blush * bone· Baby Blue· Banana Mania (a Crayola Crayon color)· Beaver (a Crayola Crayon color)· Beige· Bittersweet (a Crayola Crayon color)· Black· Blizzard Blue (a former Crayola Crayon color retired in 2003)· Blue· Blue Bell (a Crayola Crayon color)· Blue Gray (a former Crayola Crayon color retired in 1990)· Blue Green (a Crayola Crayon color)· Blue Violet (a Crayola Crayon color)· Blush (a Crayola Crayon color)· Bronze· Brown· Burnt Orange (a Crayola Crayon color)· Burnt Sienna (a Crayola Crayon color)· Burnt Umber (a Crayola Crayon color)· ByzantiumBlue.BrownBlack· Baby Blue· Banana Mania (a Crayola Crayon color)· Beaver (a Crayola Crayon color)· Beige· Bittersweet (a Crayola Crayon color)· Black· Blizzard Blue(a former Crayola Crayon color retired in 2003)· Blue· Blue Bell (a Crayola Crayon color)· Blue Gray (a former Crayola Crayon color retired in 1990)· Blue Green (a Crayola Crayon color)· Blue Violet (a Crayola Crayon color)· Blush (a Crayola Crayon color)· Bronze· Brown· Burnt Orange (a Crayola Crayon color)· Burnt Sienna (a Crayola Crayon color)· Burnt Umber (a Crayola Crayon color)· Byzantiumblue. black. brown. blonde (hair colour). beige.Blue, black, burgundy, brown

What Crayon colors have the letters lu in it?

Blue Bell, Blizzard Blue (a former Crayola Crayon color retired in 2003), Blue Gray (a former Crayola Crayon color retired in 1990), Blue Green, Blue Violet, Cadet Blue, Green Blue (a former Crayola Crayon color retired in 1990), Midnight Blue, Navy Blue, Pacific Blue, Plum, Prussian Blue (a former Crayola Crayon color changed to Midnight Blue in 1958), Robin's Egg Blue, Sky Blue, Teal Blue (a former Crayola Crayon color retired in 2003), Turquoise Blue, Ultra Blue, Violet Blue and Wild Blue Yonder are Crayola Crayon colors. They contain the letters lu.

How do you say dark blue crayon in french?

bleu foncé crayon

What are the colors that have the letter L IN IT?

· Almond (a Crayola Crayon color) · Black · Blizzard Blue(a former Crayola Crayon color retired in 2003) · Blue · Blue Bell (a Crayola Crayon color) · Blue Gray (a former Crayola Crayon color retired in 1990) · Blue Green (a Crayola Crayon color) · Blue Violet (a Crayola Crayon color) · Blush (a Crayola Crayon color) · Coral · Cornflower (a Crayola Crayon color) · Dandelion (a Crayola Crayon color) · Eggplant (a Crayola Crayon color) · Electric Lime (a Crayola Crayon color) · Emerald · Flesh (a former Crayola Crayon color retired in 1962) · Gold · Goldenrod (a Crayola Crayon color) · harlequin · hazel · Laser Lemon (a Crayola Crayon color) · Lavender (a Crayola Crayon color) · Lemon Yellow (a former Crayola Crayon color retired in 1990) · Lilac · Lime · Linen · Mauvelous (a Crayola Crayon color) · Melon (a Crayola Crayon color) · Mulberry (a former Crayola Crayon color retired in 2003) · Navy Blue (a Crayola Crayon color) · Olive · Olive Green (a Crayola Crayon color) · Orange Yellow (a former Crayola Crayon color retired in 1990) · Periwinkle (a Crayola Crayon color) · Pink Flamingo (a Crayola Crayon color) · Plum (a Crayola Crayon color) · Prussian Blue (a former Crayola Crayon color changed to Midnight Blue in 1958) · Purple Heart (a Crayola Crayon color) · Purple Mountain's Majesty (a Crayola Crayon color) · Purple Pizzazz (a Crayola Crayon color) · Radical Red (a Crayola Crayon color) · Razzle Dazzle Rose (a Crayola Crayon color) · Red Violet (a Crayola Crayon color) · Royal Purple (a Crayola Crayon color) · Salmon (a Crayola Crayon color) · Scarlet (a Crayola Crayon color) · Silver · Sky Blue (a Crayola Crayon color) · Slate Gray · Sunglow (a Crayola Crayon color) · Teal · Teal Blue (a former Crayola Crayon color retired in 2003) · Thistle (a Crayola Crayon color) · Tickle Me Pink (a Crayola Crayon color) · Timber Wolf (a Crayola Crayon color) · Tumbleweed (a Crayola Crayon color) · Ultra Blue (a Crayola Crayon color) · Ultra Green (a Crayola Crayon color) · Ultra Orange (a Crayola Crayon color) · Ultra Pink (a Crayola Crayon color) · Ultra Red (a Crayola Crayon color) · Ultra Yellow (a Crayola Crayon color) · Unmellow Yellow (a Crayola Crayon color) · Violet · Violet Blue (a former Crayola Crayon color retired in 1990) · Violet Red (a Crayola Crayon color) · Vivid Violet (a Crayola Crayon color) · Wild Blue Yonder (a Crayola Crayon color) · Wild Strawberry (a Crayola Crayon color) · Wild Watermelon (a Crayola Crayon color) · Yellow · Yellow Green (a Crayola Crayon color) · Yellow Orange (a Crayola Crayon color)

What crayon colors start with N?

Navy blue is a crayon color. Neon carrot is a Crayola Crayon color.

Why do you think you used blue and red ink in tracing the flow of blood?

I THINK that blue is used because it is the color of blood without oxygen and red is used because it is the color of blood with oxygen. Also look at your veins see what color they are.

What is the softest arrowhead?

A blue crayon

Colors starting with T?

· Tan (a Crayola Crayon color) · Thistle (a Crayola Crayon color) · Turquoise Blue (a Crayola Crayon color) · Teal Blue (a Crayola Crayon color) · Tickle Me Pink (a Crayola Crayon color) · Timber Wolf (a Crayola Crayon color) · Tropical Rain Forest (a Crayola Crayon color) · Tumbleweed (a Crayola Crayon color) · Torch Red (a Crayola Crayon color)

What crayon colors start with B?

Black, blue, bronze and brown are crayon colors. Crayola Crayon colors include Banana Mania, Beaver, Bittersweet, Blizzard Blue, Blue Bell, Blue Green, Blue Violet, Blush, Burnt Orange, Burnt Sienna, and Burnt Umber.

How do you color a school board with a blue crayon?

You take the crayon and you press it agianst the board and then you take it back and forth and the blue magically appears.